Question 1

Polyploidy can be described as ____.&#10;A) &#8203;only occurring artificially&#10;B) &#8203;only occurring when there is one set of chromosomes&#10;C) &#8203;fatal to all living things&#10;D) &#8203;occurring in about 20% of flowering plants&#10;E) &#8203;fatal in humans but common in flowering plants

Accepted Answer

E

Question 2

Who is a carrier of an X-linked trait?&#10;A) &#8203;homozygous dominant female&#10;B) &#8203;heterozygous female&#10;C) &#8203;homozygous recessive female&#10;D) &#8203;homozygous male&#10;E) &#8203;heterozygous male

Accepted Answer

Females can be carriers of X-linked traits if they are heterozygous, meaning they have one dominant and one recessive allele on their X chromosome. Homozygous dominant and recessive females would either express the dominant trait or not have the trait at all, respectively. Homozygous males have only one X chromosome, so they either express the trait or not. Heterozygous males do not typically carry X-linked traits, as they only have one X chromosome.

Question 3

Males tend to be affected in greater numbers by X-linked recessive genetic disorders than are females because&#8203;&#10;A) &#8203;females have two dominant genes for the disorder.&#10;B) &#8203;males have only one X chromosome.&#10;C) &#8203;males have a double dose of the gene.&#10;D) &#8203;Y chromosomes are not as strong as X chromosomes.&#10;E) &#8203;females have only one X chromosome.

Accepted Answer

Males have only one X chromosome, so if they inherit an X-linked recessive disorder gene, they will not have a second X chromosome with a dominant allele to mask the effects of the recessive gene. Females have two X chromosomes, so even if they inherit one X chromosome with a recessive gene, they will have another X chromosome that may have a dominant allele to compensate for it.

Question 4

Which combination makes the most sense from an evolutionary perspective?&#10;A) &#8203;light skin and vitamin D deficiency&#10;B) &#8203;light skin and extensive exposure to sun&#10;C) &#8203;dark skin and little exposure to sun&#10;D) &#8203;dark skin and folate deficiency&#10;E) &#8203;light skin and little sun, or dark skin and lots of sun

Accepted Answer

Light skin is advantageous in areas with little sun as it helps in the synthesis of vitamin D, while dark skin provides protection against UV radiation in areas with lots of sun, preventing folate degradation.

Question 5

Figure 14.8&#10;  &#10;The accompanying figure represents which chromosomal change?&#10;A) &#8203;inversion&#10;B) &#8203;deletion&#10;C) &#8203;duplication&#10;D) &#8203;translocation&#10;E) &#8203;aneuploidy

Accepted Answer

The figure likely shows a chromosomal duplication, where a segment of the chromosome is repeated, leading to an extra copy of that segment.

Question 6

A transfer of genes between non-homologous chromosomes is known as&#10;A) &#8203;crossing over.&#10;B) &#8203;aneuploidy.&#10;C) &#8203;trisomy.&#10;D) &#8203;translocation.&#10;E) &#8203;duplication.

Accepted Answer

A transfer of genes between non-homologous chromosomes is known as translocation, which involves the exchange of genetic material between two different chromosomes. This can result in genetic disorders or predisposition to certain diseases.

Question 7

If a daughter expresses an X-linked recessive trait, she inherited the trait from____.&#10;A) &#8203;her mother&#10;B) &#8203;her father&#10;C) &#8203;both parents&#10;D) &#8203;neither parent&#10;E) &#8203;her grandmother

Accepted Answer

A daughter expressing an X-linked recessive trait must have inherited one copy of the recessive allele from each parent, as females have two X chromosomes, one from each parent.

Question 8

A chromosome's gene sequence that was ABCDEFG before damage and ABFEDCG after is an example of&#10;A) &#8203;inversion.&#10;B) &#8203;deletion.&#10;C) &#8203;duplication.&#10;D) &#8203;translocation.&#10;E) &#8203;aneuploidy.

Accepted Answer

This is an example of inversion, where a segment of the chromosome breaks off and reattaches in the reverse orientation. In this case, the sequence ABCDEFG is reversed to become ABFEDCG.

Question 9

What can be said about sex-determination in humans?&#10;A) &#8203;All human sperm carry a Y chromosome.&#10;B) &#8203;25% of human zygotes are XY.&#10;C) &#8203;All zygotes carry a Y chromosome.&#10;D) &#8203;Sex depends upon which type of sperm fertilizes the egg.&#10;E) &#8203;All human eggs carry a Y chromosome.

Accepted Answer

Sex determination in humans depends on which type of sperm (carrying either an X or Y chromosome) fertilizes the egg. If a sperm carrying an X chromosome fertilizes the egg, the resulting zygote will be XX (female), while if a sperm carrying a Y chromosome fertilizes the egg, the resulting zygote will be XY (male). Therefore, option D is the correct choice. Options A, B, C, and E are all incorrect as they do not accurately reflect the process of sex determination in humans.

Question 10

How many genes are involved in determining skin color?&#8203;&#10;A) &#8203;1&#10;B) &#8203;2&#10;C) &#8203;10&#10;D) &#8203;20&#10;E) &#8203;more than 100

Accepted Answer

More than 100 genes are involved in determining skin color, including genes involved in producing melanin, the pigment that gives skin its color. Additionally, environmental factors like exposure to sunlight can also impact skin color.

Question 11

The potential causes of chromosomal aberrations include&#8203;&#10;A) &#8203;viruses only.&#10;B) &#8203;radiation only.&#10;C) &#8203;a set of specific chemicals.&#10;D) &#8203;viruses and radiation only.&#10;E) &#8203;viruses, radiation, and various chemicals.

Accepted Answer

The answer of The potential causes of chromosomal aberrations include&#8203;&#10;A)...

Question 12

A woman heterozygous for color blindness (an X-linked recessive allele) marries a man with normal color vision. What is the probability that their first child (male or female) will be color blind?&#8203;&#10;A) &#8203;25%&#10;B) &#8203;50%&#10;C) &#8203;75%&#10;D) &#8203;100%&#10;E) &#8203;0%

Accepted Answer

The answer of A woman heterozygous for color blindness (an...

Question 13

Which statement about sex chromosomes is correct?&#10;A) &#8203;The Y chromosome carries a greater number of genes for nonsexual traits than does the X.&#10;B) &#8203;X and Y are different in size but carry nearly equal numbers of genes.&#10;C) &#8203;The X chromosome carries more genes for nonsexual traits than does the Y.&#10;D) &#8203;The X chromosome carries only gender-related genes.&#10;E) &#8203;The X chromosome carries the SRY gene.

Accepted Answer

The answer of Which statement about sex chromosomes is correct?&#10;A)...

Question 14

A human X-linked disorder is&#10;A) &#8203;found only in males.&#10;B) &#8203;more frequently expressed in females.&#10;C) &#8203;found on the Y chromosome.&#10;D) &#8203;transmitted from father to son.&#10;E) &#8203;more frequently expressed in males.

Accepted Answer

The answer of A human X-linked disorder is&#10;A) &#8203;found only...

Question 15

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.&#10;A) &#8203;0%&#10;B) &#8203;25%&#10;C) &#8203;50%&#10;D) &#8203;75%&#10;E) &#8203;100%

Accepted Answer

The answer of The probability of producing a normal child...

Question 16

Figure 14.3&#10;  &#10;Which of the following is the genetic condition observed in the woman on the left in the above figure?&#10;A) &#8203;Huntington's disease&#10;B) &#8203;achondroplasia&#10;C) &#8203;triple recessive condition&#10;D) &#8203;galactosemia&#10;E) &#8203;muscular dystrophies

Accepted Answer

The answer of Figure 14.3&#10;  &#10;Which of the following...

Question 17

Figure 14.3&#10;  &#10;Achondroplasia ____.&#10;A) &#8203;is inherited as an autosomal recessive condition&#10;B) &#8203;affects about one in one million people&#10;C) &#8203;affects only homozygotes&#10;D) &#8203;is characterized by abnormally short arms and legs&#10;E) &#8203;is inherited as an X-linked disorder

Accepted Answer

The answer of Figure 14.3&#10;  &#10;Achondroplasia ____.&#10;A) &#8203;is inherited...

Question 18

&#10;A chromosome's gene sequence that was ABCDEFG before modification and ABCDCDEFG afterward is an example of&#8203;&#10;A) &#8203;inversion.&#10;B) &#8203;deletion.&#10;C) &#8203;duplication.&#10;D) &#8203;translocation.&#10;E) &#8203;aneuploidy.

Accepted Answer

The answer of  &#10;A chromosome's gene sequence that was...

Question 19

&#10;The accompanying figure represents which chromosomal change?&#10;A) &#8203;inversion&#10;B) &#8203;deletion&#10;C) &#8203;duplication&#10;D) &#8203;translocation&#10;E) &#8203;aneuploidy

Accepted Answer

The answer of  &#10;The accompanying figure represents which chromosomal...

Question 20

&#10;The accompanying figure represents which chromosomal change?&#10;A) &#8203;inversion&#10;B) &#8203;deletion&#10;C) &#8203;duplication&#10;D) &#8203;translocation&#10;E) &#8203;aneuploidy

Accepted Answer

The answer of  &#10;The accompanying figure represents which chromosomal...

Question 21

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 22

It is now possible to analyze the genetics of an in vitro fertilized embryo by&#10;A) &#8203;fetoscopy.&#10;B) &#8203;amniocentesis.&#10;C) &#8203;chorionic villi sampling.&#10;D) &#8203;pre-implantation diagnosis.&#10;E) &#8203;post-implantation diagnosis.

Accepted Answer

The answer of It is now possible to analyze the...

Question 23

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 24

__________ is a diagnostic tool that reveals missing or extra chromosomes and some structural changes in an individual's chromosomes.

Accepted Answer

The answer of __________ is a diagnostic tool that reveals...

Question 25

Males that tend to be taller than average and show mild mental impairment may have&#8203;&#10;A) &#8203;XXY chromosomes.&#10;B) &#8203;XYY chromosomes.&#10;C) &#8203;Turner syndrome.&#10;D) &#8203;Down syndrome.&#10;E) &#8203;Klinefelter syndrome.

Accepted Answer

The answer of Males that tend to be taller than...

Question 26

Changes in chromosome number are usually the result of&#8203;&#10;A) &#8203;genetic displacement.&#10;B) &#8203;trisomy.&#10;C) &#8203;crossing over.&#10;D) &#8203;nondisjunction.&#10;E) &#8203;disjunction.

Accepted Answer

The answer of Changes in chromosome number are usually the...

Question 27

Amniocentesis involves sampling&#10;A) &#8203;the fetus directly.&#10;B) &#8203;the fetal cells floating in the amniotic fluid.&#10;C) &#8203;sperm.&#10;D) blood cells.&#10;E) &#8203;placental cells.

Accepted Answer

The answer of Amniocentesis involves sampling&#10;A) &#8203;the fetus directly.&#10;B) &#8203;the...

Question 28

Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in&#10;A) &#8203;serine.&#10;B) glycine.&#10;C) &#8203;phenylalanine.&#10;D) &#8203;proline.&#10;E) &#8203;glutamic acid.

Accepted Answer

The answer of Symptoms of phenylketonuria (PKU) may be minimized...

Question 29

What is the sex chromosome composition of a person with Klinefelter syndrome?&#8203;&#10;A) &#8203;XXX&#10;B) &#8203;XO&#10;C) &#8203;XXY&#10;D) &#8203;XYY&#10;E) &#8203;YY

Accepted Answer

The answer of What is the sex chromosome composition of...

Question 30

Down syndrome involves trisomy ____.&#10;A) &#8203;3&#10;B) &#8203;5&#10;C) &#8203;15&#10;D) &#8203;19&#10;E) &#8203;21

Accepted Answer

The answer of Down syndrome involves trisomy ____.&#10;A) &#8203;3&#10;B) &#8203;5&#10;C)...

Question 31

A prenatal diagnosis procedure that has recently come into wide use and can be performed earlier than amniocentesis involves sampling the _____.&#10;A) &#8203;yolk sac material&#10;B) &#8203;allantois&#10;C) &#8203;chorion&#10;D) &#8203;yolk sac&#10;E) &#8203;umbilical cord

Accepted Answer

The answer of A prenatal diagnosis procedure that has recently...

Question 32

The human has __________ sets of autosomal chromosomes.

Accepted Answer

The answer of The human has __________ sets of autosomal...

Question 33

Which syndrome is characterized by a karyotype with 45 chromosomes?&#8203;&#10;A) &#8203;Turner&#10;B) &#8203;Down&#10;C) &#8203;androgen insensitivity&#10;D) &#8203;Klinefelter&#10;E) &#8203;cri-du-chat

Accepted Answer

The answer of Which syndrome is characterized by a karyotype...

Question 34

PKU detection includes&#8203;&#10;A) &#8203;prenatal karyotyping.&#10;B) &#8203;urine analysis at puberty.&#10;C) &#8203;blood tests at puberty.&#10;D) &#8203;saliva tests.&#10;E) &#8203;urine analysis and blood tests at birth.

Accepted Answer

The answer of PKU detection includes&#8203;&#10;A) &#8203;prenatal karyotyping.&#10;B) &#8203;urine analysis...

Question 35

The failure of chromosomes to separate during mitosis or meiosis is called&#10;A) &#8203;genetic displacement.&#10;B) &#8203;trisomy.&#10;C) &#8203;crossing over.&#10;D) &#8203;nondisjunction.&#10;E) &#8203;disjunction.

Accepted Answer

The answer of The failure of chromosomes to separate during...

Question 36

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 37

Amniocentesis is _____.&#10;A) &#8203;a surgical means of repairing deformities&#10;B) &#8203;a form of chemotherapy that modifies or inhibits gene expression or the function of gene products&#10;C) &#8203;used in prenatal diagnosis to detect chromosomal mutations and metabolic disorders in embryos&#10;D) &#8203;a form of gene replacement therapy&#10;E) &#8203;commonly performed on newborns

Accepted Answer

The answer of Amniocentesis is _____.&#10;A) &#8203;a surgical means of...

Question 38

What is the sex chromosome composition of a person with Turner syndrome?&#8203;&#10;A) &#8203;XXX&#10;B) &#8203;XO&#10;C) &#8203;XXY&#10;D) &#8203;XYY&#10;E) &#8203;YY

Accepted Answer

The answer of What is the sex chromosome composition of...

Question 39

Rarely, a chromosome's structure becomes altered when part of it undergoes duplication, deletion, __________, or __________.

Accepted Answer

The answer of Rarely, a chromosome's structure becomes altered when...

Question 40

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 41

Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive inheritance; lactose metabolism is blocked&#10;b.&#8203;nondisjunction of the twenty-first chromosomal pair&#10;c.&#8203;X-linked recessive inheritance&#10;d.&#8203;nondisjunction of the sex chromosomes&#10;Down syndrome

Accepted Answer

The answer of Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive...

Question 42

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.inversion
b.deletion
c.gene duplication
d.translocation
e.addition
A small region of a protein from three species is sequenced and found to be as follows:
Species X is alanine, glycine, glycine, threonine, alanine
Species Y is alanine, glycine, threonine, alanine
Species Z is alanine, glycine, glycine, threonine, alanine
The difference in the amino acid sequence of species Y is most likely due to this.

Accepted Answer

The answer of Select the best process listed below for...

Question 43

Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose normal complement of chromosomes is 48?

Accepted Answer

The answer of Answer the following questions in reference to...

Question 44

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.inversion
b.deletion
c.gene duplication
d.translocation
e.addition
A small region of a protein from three species is sequenced and found to be as follows:
Species X is alanine, glycine, glycine, threonine, alanine
Species Y is alanine, glycine, threonine, alanine
Species Z is alanine, glycine, glycine, threonine, alanine
The difference in the amino acid sequence of species Y is most likely due to this.

Accepted Answer

The answer of Select the best process listed below for...

Question 45

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.inversion
b.deletion
c.gene duplication
d.translocation
e.addition
A small region of a protein from three species is sequenced and found to be as follows:
Species X is alanine, glycine, threonine, alanine
Species Y is alanine, glycine, threonine, alanine
Species Z is alanine, valine, glycine, threonine, alanine
The difference in the amino acid sequence of species Z is most likely due to this.

Accepted Answer

The answer of Select the best process listed below for...

Question 46

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.inversion
b.deletion
c.gene duplication
d.translocation
e.addition
A small region of a protein from three species is sequenced and found to be as follows:
Species X is alanine, glycine, threonine, alanine
Species Y is alanine, glycine, threonine, alanine
Species Z is alanine, valine, glycine, threonine, alanine
The difference in the amino acid sequence of species Z is most likely due to this.

Accepted Answer

The answer of Select the best process listed below for...

Question 47

Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive inheritance; lactose metabolism is blocked&#10;b.&#8203;nondisjunction of the twenty-first chromosomal pair&#10;c.&#8203;X-linked recessive inheritance&#10;d.&#8203;nondisjunction of the sex chromosomes&#10;red-green color blindness

Accepted Answer

The answer of Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive...

Question 48

Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive inheritance; lactose metabolism is blocked&#10;b.&#8203;nondisjunction of the twenty-first chromosomal pair&#10;c.&#8203;X-linked recessive inheritance&#10;d.&#8203;nondisjunction of the sex chromosomes&#10;galactosemia

Accepted Answer

The answer of Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive...

Question 49

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 50

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 51

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.inversion
b.deletion
c.gene duplication
d.translocation
e.addition
A small region of a protein from three species is sequenced and found to be as follows:
Species X is alanine, glycine, threonine, alanine
Species Y is alanine, glycine, threonine, alanine
Species Z is alanine, valine, glycine, threonine, alanine
The difference in the amino acid sequence of species Z is most likely due to this.

Accepted Answer

The answer of Select the best process listed below for...

Question 52

Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive inheritance; lactose metabolism is blocked&#10;b.&#8203;nondisjunction of the twenty-first chromosomal pair&#10;c.&#8203;X-linked recessive inheritance&#10;d.&#8203;nondisjunction of the sex chromosomes&#10;hemophilia A

Accepted Answer

The answer of Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive...

Question 53

Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose normal complement of chromosomes is 48?

Accepted Answer

The answer of Answer the following questions in reference to...

Question 54

Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose normal complement of chromosomes is 48?

Accepted Answer

The answer of Answer the following questions in reference to...

Question 55

Choose the most appropriate answer for each.
a.3n; generally sterile
b.a chromosome segment is permanently transferred to a nonhomologous chromosome
c.(2n - 1); a zygote deprived of a chromosome
d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones
e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes
f.a piece of the chromosome is inadvertently left out during the repair process
g.encodes a transport protein in melanosome membranes
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
translocation

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;3n;...

Question 56

Answer the following questions in reference to the five items listed below.&#8203;&#10;a.&#8203;12&#10;b.&#8203;23&#10;c.&#8203;24&#10;d.&#8203;46&#10;e.&#8203;47&#10;The normal sperm cell of species X carries 11 chromosomes. Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova, some of the zygotes will have 21 chromosomes, and the remainder will have how many chromosomes?

Accepted Answer

The answer of Answer the following questions in reference to...

Question 57

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement.
a.inversion
b.deletion
c.gene duplication
d.translocation
e.addition
A small region of a protein from three species is sequenced and found to be as follows:
Species X is alanine, glycine, threonine, alanine
Species Y is alanine, glycine, threonine, alanine
Species Z is alanine, valine, glycine, threonine, alanine
The difference in the amino acid sequence of species Z is most likely due to this.

Accepted Answer

The answer of Select the best process listed below for...

Question 58

Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive inheritance; lactose metabolism is blocked&#10;b.&#8203;nondisjunction of the twenty-first chromosomal pair&#10;c.&#8203;X-linked recessive inheritance&#10;d.&#8203;nondisjunction of the sex chromosomes&#10;Turner syndrome

Accepted Answer

The answer of Match the cause with the disorder.&#8203;&#10;a.&#8203;autosomal recessive...

Question 59

Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose normal complement of chromosomes is 48?

Accepted Answer

The answer of Answer the following questions in reference to...

Question 60

Select the disorder that best matches each the following statements.&#8203;&#10;a.&#8203;galactosemia&#10;b.&#8203;Turner syndrome&#10;c.progeria&#10;d.&#8203;hemophilia A&#10;e.&#8203;Down syndrome&#10;This disorder is an autosomal dominant disorder.

Accepted Answer

The answer of Select the disorder that best matches each...

Question 61

Hemophilia is caused by an X-linked recessive gene. A normal woman whose father had hemophilia marries a normal man. What are the chances of hemophilia in their children?&#8203;

Accepted Answer

The answer of Hemophilia is caused by an X-linked recessive...

Question 62

An X-linked recessive gene (c) produces red-green color blindness. A normal woman whose father was color blind marries a color-blind man.&#10;(a)What are the possible genotypes for the mother of the color-blind man?&#10;(b)What are the possible genotypes for the father of the color-blind man?&#10;(c)What are the chances that the first son will be color blind?&#10;(d)What are the chances that the first daughter will be color blind?

Accepted Answer

The answer of An X-linked recessive gene (c) produces red-green...

Question 63

Select the disorder that best matches each the following statements.&#8203;&#10;a.&#8203;galactosemia&#10;b.&#8203;Turner syndrome&#10;c.progeria&#10;d.&#8203;hemophilia A&#10;e.&#8203;Down syndrome&#10;This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

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The answer of Select the disorder that best matches each...

Question 64

Red-green color blindness is an X-linked recessive trait. Two normal-vision parents have a color-blind son. Indicate the genotype and phenotype of each parent and the son.

Accepted Answer

The answer of Red-green color blindness is an X-linked recessive...

Deck 14: Chromosomes and Human Inheritance