Deck 10: Meiosis and Sexual Life Cycles

Question 1

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
The human X and Y chromosomes

A) are both present in every somatic cell of males and females alike.
B) are about the same size and have approximately the same number of genes.
C) are almost entirely homologous, despite their different names.
D) include genes that determine an individual's sex.

Answer 1

D

Question 2

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Referring to a plant's sexual life cycle, which of the following processes leads directly to the formation of gametes?

A) sporophyte meiosis
B) gametophyte mitosis
C) gametophyte meiosis
D) sporophyte mitosis

Answer 2

B

Question 3

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?

A) prophase
B) metaphase
C) anaphase
D) telophase

Answer 3

B

Question 4

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following describes a karyotype?

A) a natural cellular arrangement of chromosomes in the nucleus
B) a display of all the cell types in an organism
C) organized images of a cell's chromosomes
D) a display of a cell's mitotic stages

Question 5

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
A given organism has 46 chromosomes in its karyotype. We can therefore conclude which of the following?

A) It must be human.
B) It must be an animal.
C) It must be sexually reproducing.
D) Its gametes must have 23 chromosomes.

Question 6

The somatic cells of a privet shrub each contain 46 chromosomes. To be as different as they are from human cells, which have the same number of chromosomes, which of the following must be true?

A) Privet cells cannot reproduce sexually.
B) Genes of privet chromosomes are significantly different from those in humans.
C) Privet shrubs must be metabolically more like animals than like other shrubs.
D) Genes on a particular privet chromosome, such as the X, must be on a different human chromosome, such as number 18.

Question 7

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
A triploid cell contains three sets of chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?

A) 63 chromosomes in 31 1/2 pairs
B) 63 chromosomes in 21 sets of 3
C) 63 chromosomes, each with 3 chromatids
D) 21 chromosome pairs and 21 unique chromosomes

Question 8

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following is the smallest unit that would contain a complete copy of the entire human genome?

A) one human somatic cell
B) one human chromosome
C) all of the DNA of one human
D) one human gene

Question 9

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following is an example of alternation of generations?

A) A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular, haploid pollen grain (gametophyte).
B) A diploid animal produces gametes by meiosis, and the gametes undergo fertilization to produce a diploid zygote.
C) A haploid mushroom produces gametes by mitosis, and the gametes undergo fertilization, which is immediately followed by meiosis.
D) A diploid cell divides by mitosis to produce two diploid daughter cells, which then fuse to produce a tetraploid cell.

Question 10

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following is true of a species that has a chromosome number of 2n = 16?

A) The species has 16 sets of chromosomes per cell.
B) Each cell has eight homologous pairs.
C) During the S phase of the cell cycle there will be 32 separate chromosomes.
D) A gamete from this species has four chromosomes.

Question 11

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
If an organism is diploid and a certain gene found in the organism has 18 known alleles (variants), then any given organism of that species can/must have which of the following?

A) at most, 2 alleles for that gene
B) up to 18 chromosomes with that gene
C) up to 18 genes for that trait
D) up to, but not more than, 18 different traits

Question 12

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Eukaryotic sexual life cycles show tremendous variation. Which of the following elements do all sexual life cycles have in common?
I) alternation of generations
II) meiosis
III) fertilization
IV) gametes
V) spores

A) I, IV, and V
B) I, II, and IV
C) II, III, and IV
D) II, IV, and V

Question 13

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following descriptions correctly defines a genome?

A) representation of a complete set of a cell's polypeptides
B) the complete set of an organism's polypeptides
C) a karyotype
D) the complete set of an organism's genes

Question 14

Which of the following statements best describes a karyotype?

A) a pictorial representation of all the genes for a species
B) a display of all of the chromosomes of a single cell
C) the combination of all the maternal and paternal chromosomes of a species
D) the collection of all the chromosomes in an individual organism

Question 15

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

A) Backtrack through her previous experiments to obtain another plant with the same traits.
B) Breed this plant with another plant with much weaker traits.
C) Clone the plant asexually to produce an identical one.
D) Force the plant to self-pollinate to obtain an identical one.

Question 16

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of these statements is true?

A) In humans, the 23rd pair, the sex chromosomes, determines whether the person is female (XX) or male (XY).
B) Single, haploid (n) sets of chromosomes in ovum and sperm unite during fertilization, forming a haploid (n), single-celled zygote.
C) At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
D) Sexual life cycles among different types of organisms are identical with respect to the relative timing of meiosis and fertilization.

Question 17

Which of the following cell types or organisms can utilize both mitosis and meiosis in the correct circumstances?

A) a haploid animal cell
B) a diploid cell from a plant stem
C) any diploid animal cell
D) a unicellular alga

Question 18

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following is a true statement about sexual versus asexual reproduction?

A) Asexual reproduction, but not sexual reproduction, is characteristic of plants and fungi.
B) In sexual reproduction, individuals transmit 50% of their genes to each of their offspring.
C) In asexual reproduction, offspring are produced by fertilization without meiosis.
D) Asexual reproduction produces only haploid offspring.

Question 19

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of these is a way that the sexual life cycle increases genetic variation in a species?

A) by allowing crossing over
B) by allowing an increase in cell number
C) by increasing gene stability
D) by conserving chromosomal gene order
E) by decreasing mutation frequency

Question 20

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
Which of the following types of cells would be produced by meiosis?

A) a haploid animal cell
B) a diploid animal cell
C) a diploid plant cell
D) a diploid unicellular organism

Question 21

Which of the following events might result in a human zygote with 45 chromosomes?

A) an error in either egg or sperm meiotic anaphase
B) failure of the egg nucleus to be fertilized by the sperm
C) an error in the alignment of chromosomes on the metaphase plate
D) multiple crossover events during meiosis I

Question 22

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?

A) length and position of the centromere only
B) length, centromere position, and staining pattern only
C) length, centromere position, staining pattern, and traits coded for by their genes
D) length, centromere position, staining pattern, and DNA sequences

Question 23

During mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesins. Such molecules must have which of the following properties?

A) They must persist throughout the cell cycle.
B) They must be removed before meiosis can begin.
C) They must be removed before sister chromatids or homologous chromosomes can separate.
D) They must be intact for nuclear envelope re-formation.

Question 24

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
Centromeres of sister chromatids disjoin and chromatids separate.

A) III
B) IV
C) V
D) VII

Question 25

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
Synaptonemal complexes form or are still present.

A) I only
B) I and IV only
C) I and VIII only
D) I, II, III, and IV only

Question 26

How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis?

A) They have half the number of chromosomes and half the amount of DNA.
B) They have the same number of chromosomes and half the amount of DNA.
C) They have half the number of chromosomes and one-fourth the amount of DNA.
D) They have half the amount of cytoplasm and twice the amount of DNA.

Question 27

Chromatids are separated from each other during which of the following processes?

A) only during mitosis
B) only during meiosis I
C) only during meiosis II
D) during both mitosis and meiosis II

Question 28

To visualize and identify meiotic cells at metaphase I with a microscope, what would you look for?

A) sister chromatids of a replicated chromosome grouped at the poles
B) individual chromosomes all at the cell's center
C) an uninterrupted spindle array
D) pairs of homologous chromosomes all aligned at the cell's center

Question 29

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
Homologous chromosomes are aligned at the equator of the spindle.

A) I
B) II
C) IV
D) VI

Question 30

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
The following question refers to the essential steps in meiosis described below.
1) formation of four new nuclei, each with half the chromosomes present in the parental nucleus
2) alignment of homologous chromosomes at the metaphase plate
3) separation of sister chromatids
4) separation of the homologs; no uncoupling of the centromere
5) synapsis; chromosomes moving to the middle of the cell in pairs
Which of the steps take(s) place in both mitosis and meiosis?

A) 3
B) 5
C) 2 and 3 only
D) 2, 3, and 5

Question 31

When we see chiasmata under a microscope, that lets us know that which of the following processes has occurred?

A) meiosis II
B) anaphase II
C) prophase I
D) separation of homologs

Question 32

Which of the following happens during meiosis I?

A) Homologous chromosomes of a pair are separated from each other.
B) The chromosome number per cell is conserved.
C) Sister chromatids are separated.
D) Four daughter cells are formed.

Question 33

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?

A) 23
B) 46
C) 460
D) approximately 8.4 million

Question 34

Which of the following structures is found in a pair of homologous chromosomes?

A) two single-stranded chromosomes that have synapsed
B) two sister chromatids that have synapsed
C) four sister chromatids
D) four unique chromosomes

Question 35

If a cell has completed the first meiotic division and is just beginning meiosis II, which of the following statements describes the contents of this cell?

A) It has half the amount of DNA of the cell that began meiosis.
B) It has the same number of chromosomes, but each of them has different alleles than another cell from the same meiosis.
C) It has half the chromosomes but twice the DNA of the originating cell.
D) It is identical in content to another cell from the same meiosis.

Question 36

Which of the following events occurs in meiosis but not in mitosis?

A) chromosome replication
B) synapsis of chromosomes
C) production of daughter cells
D) condensation of chromatin

Question 37

After telophase I of meiosis, the chromosomal makeup of each daughter cell is

A) diploid, and the chromosomes are each composed of a single chromatid.
B) diploid, and the chromosomes are each composed of two chromatids.
C) haploid, and the chromosomes are each composed of a single chromatid.
D) haploid, and the chromosomes are each composed of two chromatids.

Question 38

When does the synaptonemal complex disappear?

A) late prophase of meiosis I
B) early anaphase of meiosis I
C) mid-prophase of meiosis II
D) late metaphase of meiosis II

Question 39

The karyotype of one species of primate has 48 chromosomes. In a particular female, cell division malfunctions, and she produces one of her eggs with an extra chromosome (25). The most probable source of this error would be a mistake in which of the following?

A) mitosis in her ovary
B) telophase II of one meiotic event
C) telophase I of one meiotic event
D) either anaphase I or II

Question 40

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
Independent assortment of chromosomes during meiosis is a result of

A) the random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I.
B) the random nature of the fertilization of ova by sperm.
C) the random distribution of the sister chromatids to the two daughter cells during anaphase II.
D) the relatively small degree of homology shared by the X and Y chromosomes.

Question 41

Figure 10.3
You have isolated DNA from three different cell types of an organism, determined the relative DNA content for each type, and plotted the results on the graph shown in Figure 10.3. Which sample(s) might represent an animal cell in the G2 phase of the cell cycle?

A) I
B) II
C) III
D) both I and II

Question 42

Figure 10.3
You have isolated DNA from three different cell types of an organism, determined the relative DNA content for each type, and plotted the results on the graph shown in Figure 10.3. Which sample(s) of DNA might be from a skin cell arrested in G0 of the cell cycle?

A) I
B) II
C) either I or II
D) either I or III

Question 43

Figure 10.4
A certain (hypothetical) organism is diploid, has either blue or orange wings as the consequence of one of its genes on chromosome 12, and has either long or short antennae as the result of a second gene on chromosome 19, as shown in Figure 10.4. If a female of this species has one chromosome 12 with a blue gene and another chromosome 12 with an orange gene, and has both number 19 chromosomes with short genes, she will produce which of the following egg types?

A) only blue short gene eggs
B) only orange short gene eggs
C) one-half blue short and one-half orange short gene eggs
D) three-fourths blue short and one-fourth orange short gene eggs

Question 44

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
During which process does independent assortment of chromosomes occur?

A) during mitosis only
B) during meiosis I only
C) during meiosis II only
D) during mitosis and meiosis I

Question 45

Please use the following information to answer the question(s) below.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
Because the rotifers develop from eggs, but asexually, what can you predict?

A) The eggs and the zygotes are all haploid.
B) The animals are all males.
C) Although asexual, both males and females are found in nature.
D) No males can be found.

Question 46

Figure 10.1
Refer to the life cycles illustrated in Figure 10.1. Which of the life cycles is (are) typical for most fungi and some protists?

A) I only
B) II only
C) III only
D) I and III

Question 47

Please use the following information to answer the question(s) below.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
How is natural selection related to sexual reproduction as opposed to asexual reproduction?

A) Sexual reproduction results in many new gene combinations, some of which will lead to differential reproduction.
B) Sexual reproduction results in the most appropriate and healthiest balance of two sexes in a population.
C) Sexual reproduction results in the greatest number of new mutations.
D) Sexual reproduction allows the greatest number of offspring to be produced.

Question 48

Figure 10.1
In a life cycle such as that shown in part III of Figure 10.1, if the zygote's chromosome number is 10, which of the following will be true?

A) The sporophyte's chromosome number per cell is 10 and the gametophyte's is 5.
B) The sporophyte's chromosome number per cell is 5 and the gametophyte's is 10.
C) The sporophyte and gametophyte each have 10 chromosomes per cell.
D) The sporophyte and gametophyte each have 5 chromosomes per cell.

Question 49

Please use the following information to answer the question(s) below.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
A human cell containing 22 autosomes and a Y chromosome is

A) a sperm.
B) an egg.
C) a zygote.
D) a somatic cell of a male.

Question 50

Figure 10.2
Refer to the drawings in Figure 10.2 of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis. Which diagram(s) represent(s) anaphase II of meiosis?

A) II only
B) III only
C) V only
D) either II or V

Question 51

Figure 10.2
Refer to the drawings in Figure 10.2 of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis. Which diagram represents anaphase I of meiosis?

A) I
B) II
C) IV
D) V

Question 52

Figure 10.4
A certain (hypothetical) organism is diploid, has either blue or orange wings as the consequence of one of its genes on chromosome 12, and has either long or short antennae as the result of a second gene on chromosome 19, as shown in Figure 10.4. A female with a paternal set of one orange and one long gene chromosome and a maternal set composed of one blue and one short gene chromosome is expected to produce which of the following types of eggs after meiosis?

A) All eggs will have paternal types of gene combinations.
B) Half the eggs will have maternal and half will have paternal combinations.
C) Each egg has a one-fourth chance of having blue long, blue short, orange long, or orange short combinations.
D) Each egg has a three-fourths chance of having blue long, one-fourth blue short, three-fourths orange long, or one-fourth orange short combinations.

Question 53

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
Which of the following statements best describes how often crossing over occurs in humans?

A) ~50 times per chromosome pair
B) ~2 times per meiotic cell
C) at least 1-3 times per chromosome pair
D) ~1 time per pair of sister chromatids

Question 54

Figure 10.4
A certain (hypothetical) organism is diploid, has either blue or orange wings as the consequence of one of its genes on chromosome 12, and has either long or short antennae as the result of a second gene on chromosome 19, as shown in Figure 10.4. A certain female's number 12 chromosomes both have the blue gene and number 19 chromosomes both have the long gene. As cells in her ovaries undergo meiosis, her resulting eggs (ova) may have which of the following?

A) either two number 12 chromosomes with blue genes or two with orange genes
B) either two number 19 chromosomes with long genes or two with short genes
C) either one blue or one orange gene in addition to either one long or one short gene
D) one chromosome 12 with one blue gene and one chromosome 19 with one long gene

Question 55

For the following question(s), match the key event of meiosis with the stages listed below.
I. prophase I V. prophase II
II. metaphase I VI. metaphase II
III. anaphase I VII. anaphase II
IV. telophase I VIII. telophase II
When homologous chromosomes cross over, what is the result?

A) Two sister chromatids get tangled, resulting in one altering the sequence of its DNA.
B) Two sister chromatids exchange identical pieces of DNA.
C) Specific proteins break the two strands of nonsister chromatids and re-join them.
D) Each of the four DNA strands of a homologous pair is broken, and the pieces are mixed.

Question 56

Please use the following information to answer the question(s) below.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
Homologous chromosomes move toward opposite poles of a dividing cell during

A) mitosis.
B) meiosis I.
C) meiosis II.
D) fertilization.

Question 57

Figure 10.1
Refer to the life cycles illustrated in Figure 10.1. Which of the life cycles is (are) typical for plants and some algae?

A) I only
B) II only
C) III only
D) I and II

Question 58

Figure 10.1
In part III of Figure 10.1, the progression of events corresponds to which of the following series?

A) zygote, mitosis, gametophyte, mitosis, fertilization, zygote, mitosis
B) sporophyte, meiosis, spore, mitosis, gametophyte, mitosis, gametes, fertilization
C) fertilization, mitosis, multicellular haploid, mitosis, spores, sporophyte
D) gametophyte, meiosis, zygote, spores, sporophyte, zygote

Question 59

Figure 10.1
Refer to the life cycles illustrated in Figure 10.1. Which of the life cycles is (are) typical for animals?

A) I only
B) II only
C) III only
D) I and II

Question 60

Figure 10.3
You have isolated DNA from three different cell types of an organism, determined the relative DNA content for each type, and plotted the results on the graph shown in Figure 10.3.
Which sample(s) might represent a zygote?

A) I
B) II
C) III
D) either I or II

Question 61

Please use the following information to answer the question(s) below.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
If we continued to follow the cell lineage from question 3, the DNA content of a cell at metaphase of meiosis II would be

A) 0.25x.
B) 0.5x.
C) x.
D) 2x.

Question 62

Please use the following information to answer the question(s) below.
There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations.
If the DNA content of a diploid cell in the G1 phase of the cell cycle is represented by x, then the DNA content of the same cell at metaphase of meiosis I would be

A) 0.25x.
B) 0.5x.
C) x.
D) 2x.