Question 1

Closely linked genes nearly always end up

Accepted Answer

A)  crossing over. 
B)  assorting independently. 
C)  in the same gamete. 
D)  segregated during meiosis. 
E)  inverted. 
A)  crossing over. 
B)  assorting independently. 
C)  in the same gamete. 
D)  segregated during meiosis. 
E)  inverted.

Question 2

Which of the following designates a human female with Turner's Syndrome?

Accepted Answer

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

Question 3

If a chromosome's gene sequence is represented by the letters A - B - C - D - E - F - G before modification and A - B - C - D - L - M - N - O - P afterward, this would be an example of

Accepted Answer

A)  inversion. 
B)  deletion. 
C)  duplication. 
D)  translocation. 
E)  crossing over. 
A)  inversion. 
B)  deletion. 
C)  duplication. 
D)  translocation. 
E)  crossing over.

Question 4

Match between columns
                        Premises: This disorder is also known as trisomy 21.
This disorder is an autosomal recessive disorder.
This disorder is an X-linked recessive trait.
Gene therapy has been tried recently for this disorder.
This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

Accepted Answer

The Answer of hemophilia and AIDS and Down syndrome. and is...

Question 5

In humans, an X-linked disorder called coloboma iridia (a fissure in the iris) is a recessive trait. A normal couple has an afflicted daughter. The husband sues the wife for divorce on the grounds of infidelity. Would you vote in his favor?

Accepted Answer

Yes, the daughter wo

Question 6

Which is NOT a chromosomal aberration?

Accepted Answer

A)  deletion 
B)  extra chromosomes 
C)  translocation (exchange of parts between nonhomologs) 
D)  crossing over 
E)  fewer chromosomes 
A)  deletion 
B)  extra chromosomes 
C)  translocation (exchange of parts between nonhomologs) 
D)  crossing over 
E)  fewer chromosomes

Question 7

Selecting the Exception Four of the five answers listed below are related conditions in which abnormal numbers of chromosomes are present. Select the exception.

Accepted Answer

A)  monosomy 
B)  Down syndrome 
C)  nondisjunction 
D)  complete chromosome set 
E)  trisomy 
A)  monosomy 
B)  Down syndrome 
C)  nondisjunction 
D)  complete chromosome set 
E)  trisomy

Question 8

Selecting the Exception Four of the five answers listed below are conditions caused by chromosomal nondisjunction. Select the exception.

Accepted Answer

A)  Down syndrome 
B)  Huntington's disorder 
C)  Turner syndrome 
D)  Klinefelter syndrome 
E)  trisomy 21 
A)  Down syndrome 
B)  Huntington's disorder 
C)  Turner syndrome 
D)  Klinefelter syndrome 
E)  trisomy 21

Question 9

The genotype of a person with testicular feminizing syndrome is

Accepted Answer

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

Question 10

Males who tend to be taller than average may have a chromosomal composition of

Accepted Answer

A)  XXY. 
B)  XYY. 
C)  Turner syndrome. 
D)  Down syndrome. 
E)  XXX. 
A)  XXY. 
B)  XYY. 
C)  Turner syndrome. 
D)  Down syndrome. 
E)  XXX.

Question 11

The sex chromosome composition of a person with Turner syndrome is most accurately written as

Accepted Answer

A)  XXX. 
B)  XO. 
C)  XXY. 
D)  XYY. 
E)  X. 
A)  XXX. 
B)  XO. 
C)  XXY. 
D)  XYY. 
E)  X.

Question 12

Match between columns
                        Premises: 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 ____.
A small region of a protein from three species is sequenced and found to 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 differences in the amino acid sequence of species Z is most likely due to ____.
The nucleotide sequences of homologous regions of DNA of two species is AATGCCCCGTTA and AATGCCCCGCTTA. If this is not the result of a nucleotide base-pair addition, then it is most likely the result of ____.
Homologous sets of genes ABCDEF and AEDCBF are located on homologous chromosomes. Crossing over between them is suppressed because of ____.
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 ____.

Accepted Answer

The Answer of an addition. and an addition and a is...

Question 13

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

Accepted Answer

father CY

Question 14

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

4/100 x 4/

Question 15

A set of symptoms that usually occur together and characterize a disorder is called

Accepted Answer

A)  an abnormality. 
B)  a deviation. 
C)  a syndrome. 
D)  a carrier. 
E)  a pedigree. 
A)  an abnormality. 
B)  a deviation. 
C)  a syndrome. 
D)  a carrier. 
E)  a pedigree.

Question 16

The pattern that would illustrate the inheritance of Huntington's is labeled by the letter ____.

Accepted Answer

The answer of   
 The pattern that would...

Question 17

Which chemical builds up in Tay-Sachs disease?

Accepted Answer

A)  albumin 
B)  glycogen 
C)  amyloid 
D)  fibrillin 
E)  sphingolipids 
A)  albumin 
B)  glycogen 
C)  amyloid 
D)  fibrillin 
E)  sphingolipids

Question 18

Which of the following would be considered a carrier of a sex-linked recessive defect?

Accepted Answer

A)  a man with the defect 
B)  a woman with the defect 
C)  a father of a son with the defect 
D)  the normal daughter whose father had the defect 
E)  a son of two unaffected parents 
A)  a man with the defect 
B)  a woman with the defect 
C)  a father of a son with the defect 
D)  the normal daughter whose father had the defect 
E)  a son of two unaffected parents

Question 19

The probability of producing a child who suffers from cystic fibrosis by two parents who are carriers for the autosomal recessive disorder is

Accepted Answer

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

Question 20

Which of the following is NOT true of polyploidy?

Accepted Answer

A)  It produces twinning in humans. 
B)  It occurs in plants without negative effects. 
C)  It results in multiple sets of chromosomes. 
D)  It could produce three copies of each chromosome. 
E)  It produces multiple copies of alleles. 
A)  It produces twinning in humans. 
B)  It occurs in plants without negative effects. 
C)  It results in multiple sets of chromosomes. 
D)  It could produce three copies of each chromosome. 
E)  It produces multiple copies of alleles.

Exam 20: Chromosomes and Human Genetics

Closely linked genes nearly always end up

Which of the following designates a human female with Turner's Syndrome?

If a chromosome's gene sequence is represented by the letters A - B - C - D - E - F - G before modification and A - B - C - D - L - M - N - O - P afterward, this would be an example of

In humans, an X-linked disorder called coloboma iridia (a fissure in the iris) is a recessive trait. A normal couple has an afflicted daughter. The husband sues the wife for divorce on the grounds of infidelity. Would you vote in his favor?

Which is NOT a chromosomal aberration?

Selecting the Exception Four of the five answers listed below are related conditions in which abnormal numbers of chromosomes are present. Select the exception.

Selecting the Exception Four of the five answers listed below are conditions caused by chromosomal nondisjunction. Select the exception.

The genotype of a person with testicular feminizing syndrome is

Males who tend to be taller than average may have a chromosomal composition of

The sex chromosome composition of a person with Turner syndrome is most accurately written as

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

If an X-linked recessive gene is expressed in 4 percent of the men, what proportion of women would express the recessive trait?

A set of symptoms that usually occur together and characterize a disorder is called

The pattern that would illustrate the inheritance of Huntington's is labeled by the letter ____.

Which chemical builds up in Tay-Sachs disease?

Which of the following would be considered a carrier of a sex-linked recessive defect?

The probability of producing a child who suffers from cystic fibrosis by two parents who are carriers for the autosomal recessive disorder is

Which of the following is NOT true of polyploidy?

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

Human Impacts on the Biosphere

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