Question 1

The failure of chromosomes to separate during mitosis or meiosis is called

Accepted Answer

A)  genetic displacement. 
B)  trisomy. 
C)  crossing over. 
D)  nondisjunction. 
E)  disjunction.

Question 2

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 an X-linked recessive trait.

Accepted Answer

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

Question 3

-Concerning the sex chromosomes, which of the following is correct?

Accepted Answer

A)  The Y chromosome carries a greater number of genes for nonsexual traits than does the X. 
B)  X and Y are different in size but carry nearly equal numbers of genes. 
C)  The X chromosome carries more genes for nonsexual traits than does the Y. 
D)  The X chromosome carries only gender-related genes. 
E)  The X chromosome carries the SRY gene.

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
-translocation

Accepted Answer

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

Question 5

Classification.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 the somatic cells of a child born with Down syndrome (trisomy 21)?

Accepted Answer

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

Question 6

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

Accepted Answer

The answer of Matching.Match the cause with the disorder.
a.autosomal recessive...

Question 7

Which of the following syndromes is characterized by a karyotype with 45 chromosomes?

Accepted Answer

A)  Turner 
B)  Down 
C)  androgen insensitivity 
D)  Klinefelter 
E)  cri-du-chat

Question 8

A genetic disorder has been studied through multiple generations using pedigree analysis.Every person expressing the trait has an affected parent, and both sexes are equally affected.This suggests what sort of trait and why?

Accepted Answer

The answer of A genetic disorder has been studied through...

Question 9

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

Accepted Answer

The answer of Matching.Match the cause with the disorder.
a.autosomal recessive...

Question 10

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, glycine, 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 Y is most likely due to this.

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

Which of the following nondisjunction disorders must be due to an event is sperm development: XO, XXX, XXY or XYY?

Accepted Answer

The answer of Which of the following nondisjunction disorders must...

Question 13

The human has __________ sets of autosomal chromosomes.

Accepted Answer

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

Question 14

If a daughter expresses an X-linked recessive gene, she inherited the trait from

Accepted Answer

A)  her mother. 
B)  her father. 
C)  both parents. 
D)  neither parent. 
E)  her grandmother.

Exam 14: Chromosomes and Human Inheritance

The failure of chromosomes to separate during mitosis or meiosis is called

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 an X-linked recessive trait.