Deck 9: Sexual Reproduction

Question 1

The formation of sperm is termed

A)oogenesis.
B)homologous formation.
C)spermatogenesis.
D)synapsis.
E)mitosis.

Answer 1

C
Explanation: Spermatogenesis is the process of forming sperm.

Question 2

Figure:
In the figure of the life cycle of humans,what does "e" represent?

A)meiosis
B)mitosis
C)haploid egg
D)diploid egg
E)zygote or embryo

Answer 2

C
Explanation: The egg is the human female's gamete and is haploid.

Question 3

During which stage do homologous chromosomes move away from each other?

A)anaphase I
B)prophase
C)anaphase II
D)metaphase I
E)metaphase II

Answer 3

A
Explanation: Homologs separate during anaphase I.

Question 4

A geneticist is studying the failure of chromosomes to separate properly during meiosis.Which of the following would he be studying?

A)crossing-over
B)synapsis
C)translocation
D)inversion
E)nondisjunction

Question 5

A person with Klinefelter syndrome has long arms,long legs and some breast development due to which chromosomal anomaly?

A)XYY
B)Trisomy 18
C)Trisomy 13
D)XXY
E)Monosomy X

Question 6

Gametes and spores

A)are both produced by animals.
B)are autosomal.
C)are haploid.
D)are diploiD.
E)join in fertilization.

Question 7

Meiosis results in a change in chromosome number which can be written as

A)"3n to 2n."
B)"2n to n."
C)"3n to n."
D)"4n to 3n."
E)"4n to 2n."

Question 8

Figure:
In the figure of the life cycle of humans,what does "a" represent?

A)diploid egg
B)meiosis II
C)zygote or embryo
D)fertilization
E)mitosis

Question 9

A geneticist found that the gene order is ABCDEFG on one chromosome and the gene order is ABCDEDEFG on the other homologous chromosome.That means that there was a change in the chromosome structure called a(n)

A)duplication.
B)inversion.
C)translocation.
D)trisomy.
E)deletion.

Question 10

Genetic variation in organisms is produced by

A)mitosis.
B)crossing-over,independent assortment,and fertilization.
C)random fertilization.
D)mutations.
E)meiosis.

Question 11

Figure:
In the figure of the life cycle of humans,what does "d" represent?

A)fertilization
B)zygote or embryo
C)gamete production
D)mitosis
E)meiosis II

Question 12

Which of the following chromosomal anomalies does not usually cause any symptoms in humans?

A)Trisomy 13
B)Trisomy X
C)Trisomy 18
D)Trisomy 21
E)Trisomy Y

Question 13

A geneticist is studying the movement of a chromosome segment from one chromosome to another.This scientist would be studying a(n)

A)duplication.
B)trisomy.
C)inversion.
D)deletion.
E)translocation.

Question 14

An organism that has more or less than the normal number of chromosomes is called:

A)haploid.
B)tetraploid.
C)aneuploid.
D)triploiD.
E)karyoploid.

Question 15

A basic difference between spermatogenesis and oogenesis is that in oogenesis

A)four functional eggs are produced.
B)only one cell eventually completes meiosis II.
C)both sperm and egg are produced.
D)four cells are produced and fertilization is required for completion.
E)one cell is produced and fertilization is required for completion.

Question 16

A geneticist finds three copies of chromosome 21 in the karyotype of a patient,leading to the conclusion that the patient has what anomaly?

A)Turner syndrome
B)Patau syndrome
C)Klinefelter syndrome
D)Down syndrome
E)Edwards syndrome

Question 17

The fusion of sperm and egg is called synapsis.

Question 18

Crossing-over occurs during which of the following phases?

A)prophase II
B)metaphase II
C)anaphase I
D)metaphase I
E)prophase I

Question 19

The second meiotic division is essentially a mitotic division except for the fact that the cells produced are

A)diploid.
B)somatic.
C)haploid.
D)polyploidy.
E)autosomal.

Question 20

Which chromosome configuration designates a person with Turner syndrome?

A)XO
B)XY
C)XYY
D)XX
E)XXY

Question 21

Autosomes are the majority of human chromosomes.

Question 22

The nuclear envelope does not reform during telophase I.

Question 23

The nuclear envelope does not reform during telophase II.

Question 24

What phase of meiosis precedes prophase II?

A)telophase I
B)anaphase I
C)metaphase II
D)anaphase II
E)telophase II

Question 25

Females with Turner Syndrome have sex chromosomes which can be represented as

A)XO
B)XX
C)XY
D)XXY
E)OY

Question 26

X chromosomes are examples of autosomes.

Question 27

Chromosomes condense during prophase I.

Question 28

The plant lifecycle is one of alternation of generations.

Question 29

A geneticist is studying the genetic makeup of a baby and discovers that part of chromosome five has a piece missing.The baby is suffering from:

A)Down syndrome
B)Turner syndrome
C)Edward syndrome
D)Klinefelter syndrome
E)Cri du Chat syndrome

Question 30

Which of these events happens during anaphase I?

A)Sister chromatids separate.
B)Chromosomes condense.
C)Homologous chromosomes separate.
D)The nuclear membrane disappears.
E)Recombination occurs.

Question 31

Chromosomes do not need to condense during prophase I.

Question 32

Which of these events happens during anaphase II?

A)Sister chromatids separate.
B)Chromosomes condense.
C)Homologous chromosomes separate.
D)The nuclear membrane disappears.
E)Recombination occurs.

Question 33

Nondisjunction can lead to aneuploid organisms.

Question 34

Mitosis and meiosis differ in that

A)meiosis does not change the number of chromosomes per cell.
B)mitosis doubles the number of chromosomes per cell.
C)meiosis doubles the number of chromosomes per cell.
D)mitosis does not change the number of chromosomes per cell.
E)mitosis triples the number of chromosomes per cell.

Question 35

If a new kind of slug were found which had a system of sex determination just like that of humans,it would have

A)both sex chromosomes and autosomes.
B)both sex chromosomes and plasmids.
C)both sex chromosomes and asexual chromosomes..
D)both X and Z chromosomes.
E)both autosomes and Y chromosomes.

Question 36

Mitosis produces half as many daughter cells as meiosis.

Question 37

Persons affected by Kleinfelter Syndrome can be helped by supplemental estrogen.

Question 38

It is possible for a person with Down's Syndrome to live an active,successful life.

Question 39

Common lifecycles include haploid and diploid.

Question 40

Males with Kleinfelter syndrome have sex chromosomes which can be represented as

A)XO
B)XX
C)XY
D)XXY
E)OY

Question 41

Mitosis and meiosis result in cells containing the same total number of chromosomes.

Question 42

The process which leads to more genetic diversity in meiosis is called

A)nondisjunction.
B)disjunction.
C)inheritance.
D)crossing over.
E)syngamy.

Question 43

The long parts of chromosomes are called legs of the chromosome.

Question 44

When genetic variation is created in meiosis I,this explains independent assortment.

Question 45

Homologues are corresponding chromosomes with genes in the same order,though alleles may differ between them.

Question 46

Chromosomes cannot be homoloques if they have the same genes but different alleles of those genes.

Question 47

Mitosis and meiosis both require two nuclear divisions.

Question 48

Animals and flowering plants generally have pairs of chromosomes in their nuclei.

Question 49

When a scientist observes a cell undergoing meiosis,microscopic examination shows too much DNA in one gamete and too little in another.The most likely explanation is that there was an occurrence of

A)nondisjunction.
B)misinheritance.
C)synapsis.
D)telophase I.
E)mitosis.

Question 50

Mitosis and meiosis both produce genetically identical daughter cells.