Question 1

-The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Accepted Answer

A)  0%. 
B)  25%. 
C)  50%. 
D)  75%. 
E)  100%.

Question 2

-Which of the following is the genetic condition observed in the middle person from the above figure?

Accepted Answer

A)  Huntington disease 
B)  acondroplasia 
C)  triple recessive condition 
D)  galactosemia 
E)  all of these

Question 3

How did the cessation of crossing-over contribute to the disparity between the X and Y chromosomes?

Accepted Answer

The answer of How did the cessation of crossing-over contribute...

Question 4

MATCHING
Matching.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.inhibits microtubule assembly; used in karyotyping
h.a chromosome segment that has been cut out and rejoined at the same place, but backward
-inversion

Accepted Answer

The answer of MATCHING
Matching.Choose the most appropriate answer for each.
a.3n;...

Question 5

Classification.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.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-Homologous sets of genes ABCDEF and aBCdEF are located on nonhomologous chromosomes.Crossing over between them is suppressed because their locations are the result of this.

Accepted Answer

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

Question 6

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-If an X-linked recessive gene is expressed in 4 percent of the men, what proportion of women would express the recessive trait?

Accepted Answer

The answer of Classification.Select the best disorder listed below to...

Question 7

Classification.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.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-The nucleotide sequences of homologous regions of DNA of two species are AATGCCCCGTTA and AATGCCCCGCTTA.If this is not the result of a nucleotide base-pair addition, then it is most likely the result of this.

Accepted Answer

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

Question 8

The sex chromosome composition of a person with Klinefelter syndrome is

Accepted Answer

A)  XXX. 
B)  XO. 
C)  XXY. 
D)  XYY. 
E)  none of these.

Question 9

Classification.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.an inversion
b.a deletion
c.a gene duplication
d.a translocation
e.an addition
-A small region of a protein from three species is sequenced and found to be as follows:
species X is alanine, valine, 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 Classification.Select the best process listed below for...

Question 10

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

Accepted Answer

The answer of Classification.Select the best disorder listed below to...

Question 11

Which of the following is a transfer of genes between non-homologous chromosomes?

Accepted Answer

A)  crossing over 
B)  aneuploidy 
C)  trisomy 
D)  translocation 
E)  duplication

Question 12

Classification.Answer the following questions in reference to the five items listed below.
a.12
b.23
c.24
d.46
e.47
-Following a gene duplication event involving only five loci, how many chromosomes will a human female have?

Accepted Answer

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

Question 13

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 will be color blind?

Accepted Answer

A)  25% 
B)  50% 
C)  75% 
D)  100% 
E)  none of these

Question 14

It is now possible to analyze the genetics of the new generation by

Accepted Answer

A)  fetoscopy. 
B)  amniocentesis. 
C)  chorionic villi sampling. 
D)  preimplantation diagnosis. 
E)  all of these.

Question 15

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-For this disorder, both a phenotypic cure and a genotypic cure are potentially possible.

Accepted Answer

The answer of Classification.Select the best disorder listed below to...

Question 16

Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in

Accepted Answer

A)  serine. 
B)  glycine. 
C)  phenylalanine. 
D)  proline. 
E)  glutamic acid.

Question 17

Chromosomal aberrations can be produced by exposure to

Accepted Answer

A)  viruses. 
B)  radiation. 
C)  various chemicals. 
D)  viruses and radiation only. 
E)  viruses, radiation, and various chemicals.

Question 18

-The above figure represents which of the following chromosomal changes:

Accepted Answer

A)  inversion 
B)  deletion 
C)  duplication 
D)  translocation 
E)  aneuploidy

Question 19

Classification.Select the best disorder listed below to match the following statements.
a.Galactosemia
b.Turner syndrome
c.Klinefelter's syndrome
d.hemophilia A
e.Down syndrome
-An X-linked recessive gene (c) produces red-green color blindness.A normal woman whose father was color blind marries a color-blind man.
(a)
What are the possible genotypes for the mother of the color-blind man?
(b)
What are the possible genotypes for the father of the color-blind man?
(c)
What are the chances that the first son will be color blind?
(d)
What are the chances that the first daughter will be color blind?

Accepted Answer

The answer of Classification.Select the best disorder listed below to...

Question 20

Which of the following is most logical from a health perspective?

Accepted Answer

A)  Light skin and little exposure to sun. 
B)  Light skin and extensive exposure to sun. 
C)  Dark skin and little exposure to sun. 
D)  Dark skin and lots of exposure to sun. 
E)  Light skin and little sun, or dark skin and lots of sun.

Exam 14: Chromosomes and Human Inheritance

-The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

-Which of the following is the genetic condition observed in the middle person from the above figure?

How did the cessation of crossing-over contribute to the disparity between the X and Y chromosomes?

The sex chromosome composition of a person with Klinefelter syndrome is

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

Which of the following is a transfer of genes between non-homologous chromosomes?

Classification.Answer the following questions in reference to the five items listed below. a.12 b.23 c.24 d.46 e.47 -Following a gene duplication event involving only five loci, how many chromosomes will a human female have?

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 will be color blind?

It is now possible to analyze the genetics of the new generation by

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -For this disorder, both a phenotypic cure and a genotypic cure are potentially possible.

Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in

Chromosomal aberrations can be produced by exposure to

-The above figure represents which of the following chromosomal changes:

Which of the following is most logical from a health perspective?