Question 1

Chromosomes other than those involved in sex determination are known as

Accepted Answer

A)  nucleosomes. 
B)  heterosomes. 
C)  alleles. 
D)  autosomes. 
E)  liposomes. 
A)  nucleosomes. 
B)  heterosomes. 
C)  alleles. 
D)  autosomes. 
E)  liposomes.

Question 2

The condition known as "Philadelphia chromosome" is an example of

Accepted Answer

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

Question 3

Males with low fertility, abnormally small testes, sparse body hair, and enlarged breasts probably have a genotype of

Accepted Answer

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

Question 4

Karyotyping involves taking pictures of chromosomes during

Accepted Answer

A)  prophase. 
B)  telophase. 
C)  metaphase. 
D)  interphase. 
E)  anaphase. 
A)  prophase. 
B)  telophase. 
C)  metaphase. 
D)  interphase. 
E)  anaphase.

Question 5

Match between columns
                        Premises: polyploidy
trisomy
translocation
duplication
monosomy
colchicine
deletion

Accepted Answer

The Answer of inhibits microtubule assembly; prevents chromosome movement and is...

Question 6

The pattern that would illustrate the inheritance of cystic fibrosis is labeled by the letter ____.

Accepted Answer

The answer of   
 The pattern that would...

Question 7

Which of the following statements is false?

Accepted Answer

A)  Crossing over tends to reduce the frequency that two linked genes are inherited together. 
B)  Independent assortment of homologous chromosomes during meiosis increases variation. 
C)  Crossing over leads to variation. 
D)  An abnormal number or structure of chromosomes may influence the course of evolution. 
E)  The closer together genes are found on a chromosome, the greater the chance that crossing over will occur between them. 
A)  Crossing over tends to reduce the frequency that two linked genes are inherited together. 
B)  Independent assortment of homologous chromosomes during meiosis increases variation. 
C)  Crossing over leads to variation. 
D)  An abnormal number or structure of chromosomes may influence the course of evolution. 
E)  The closer together genes are found on a chromosome, the greater the chance that crossing over will occur between them.

Question 8

Genetic recombination as a result of crossing over occurs more readily in genes that

Accepted Answer

A)  are on the sex chromosomes. 
B)  are on the autosomes. 
C)  are located close together on the same chromosome. 
D)  are located farther apart on the same chromosome. 
E)  are located on different chromosomes. 
A)  are on the sex chromosomes. 
B)  are on the autosomes. 
C)  are located close together on the same chromosome. 
D)  are located farther apart on the same chromosome. 
E)  are located on different chromosomes.

Question 9

If a father and a son are both color blind and the mother is normal, is it likely that the son inherited color blindness from his father?

Accepted Answer

No, males inherit al

Question 10

DNA coding regions that affect the same trait are called

Accepted Answer

A)  homologues. 
B)  alleles. 
C)  autosomes. 
D)  loci. 
E)  gametes. 
A)  homologues. 
B)  alleles. 
C)  autosomes. 
D)  loci. 
E)  gametes.

Question 11

Sex influenced traits most likely appear due to the influence of

Accepted Answer

A)  adrenal hormones. 
B)  estrogen. 
C)  testosterone. 
D)  both estrogen and testosterone. 
E)  growth hormone. 
A)  adrenal hormones. 
B)  estrogen. 
C)  testosterone. 
D)  both estrogen and testosterone. 
E)  growth hormone.

Question 12

If a study of several pedigrees demonstrated that two parents are normal but their children express a trait, then the trait is controlled by a

Accepted Answer

A)  codominant gene. 
B)  simple dominant gene. 
C)  recessive gene. 
D)  sex-linked gene. 
E)  No conclusion can be drawn. 
A)  codominant gene. 
B)  simple dominant gene. 
C)  recessive gene. 
D)  sex-linked gene. 
E)  No conclusion can be drawn.

Question 13

Color blindness is an X-linked trait in humans. If a color-blind woman marries a man with normal vision, the children will be

Accepted Answer

A)  all color-blind daughters, but normal sons. 
B)  all color-blind sons, but carrier daughters. 
C)  all normal sons, but carrier daughters. 
D)  all color-blind children. 
E)  all normal children. 
A)  all color-blind daughters, but normal sons. 
B)  all color-blind sons, but carrier daughters. 
C)  all normal sons, but carrier daughters. 
D)  all color-blind children. 
E)  all normal children.

Question 14

A human X-linked recessive gene may be

Accepted Answer

A)  found on the Y chromosome. 
B)  passed to daughters from their fathers. 
C)  passed to sons from their mothers. 
D)  expressed more commonly among females. 
E)  both passed to daughters from their fathers and passed to sons from their mothers. 
A)  found on the Y chromosome. 
B)  passed to daughters from their fathers. 
C)  passed to sons from their mothers. 
D)  expressed more commonly among females. 
E)  both passed to daughters from their fathers and passed to sons from their mothers.

Question 15

Familial hypercholesterolemia affects approximately what paercentage of individuals?

Accepted Answer

A)  1/500 
B)  1/5 
C)  1/50 
D)  1/1,000 
E)  2/100 
A)  1/500 
B)  1/5 
C)  1/50 
D)  1/1,000 
E)  2/100

Question 16

Hemophilia

Accepted Answer

A)  is rare in the human population. 
B)  is more common among men. 
C)  was common in English royalty. 
D)  is an X-linked recessive trait. 
E)  all of these 
A)  is rare in the human population. 
B)  is more common among men. 
C)  was common in English royalty. 
D)  is an X-linked recessive trait. 
E)  all of these

Question 17

Down syndrome is associated with

Accepted Answer

A)  mental retardation. 
B)  abnormal skeletal development. 
C)  weak muscle reflexes. 
D)  slowly developing motor functions. 
E)  all of these. 
A)  mental retardation. 
B)  abnormal skeletal development. 
C)  weak muscle reflexes. 
D)  slowly developing motor functions. 
E)  all of these.

Question 18

A developing fetuses sex is determined by

Accepted Answer

A)  female gamete (oogonia). 
B)  at the beginning of the third trimester. 
C)  male gamete (spermatogonia). 
D)  puberty. 
E)  autosomes. 
A)  female gamete (oogonia). 
B)  at the beginning of the third trimester. 
C)  male gamete (spermatogonia). 
D)  puberty. 
E)  autosomes.

Question 19

Certain human cancer cells may demonstrate which of the following?

Accepted Answer

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

Question 20

A karyotype

Accepted Answer

A)  compares one set of chromosomes to another. 
B)  is a visual display of chromosomes arranged according to size. 
C)  is a photograph of cells undergoing mitosis during anaphase. 
D)  of a normal human cell shows 48 chromosomes. 
E)  can reveal the genotype of an individual. 
A)  compares one set of chromosomes to another. 
B)  is a visual display of chromosomes arranged according to size. 
C)  is a photograph of cells undergoing mitosis during anaphase. 
D)  of a normal human cell shows 48 chromosomes. 
E)  can reveal the genotype of an individual.

Exam 20: Chromosomes and Human Genetics

Chromosomes other than those involved in sex determination are known as

The condition known as "Philadelphia chromosome" is an example of

Males with low fertility, abnormally small testes, sparse body hair, and enlarged breasts probably have a genotype of

Karyotyping involves taking pictures of chromosomes during

The pattern that would illustrate the inheritance of cystic fibrosis is labeled by the letter ____.

Which of the following statements is false?

Genetic recombination as a result of crossing over occurs more readily in genes that

If a father and a son are both color blind and the mother is normal, is it likely that the son inherited color blindness from his father?

DNA coding regions that affect the same trait are called

Sex influenced traits most likely appear due to the influence of

If a study of several pedigrees demonstrated that two parents are normal but their children express a trait, then the trait is controlled by a

Color blindness is an X-linked trait in humans. If a color-blind woman marries a man with normal vision, the children will be

A human X-linked recessive gene may be

Familial hypercholesterolemia affects approximately what paercentage of individuals?

Hemophilia

Down syndrome is associated with

A developing fetuses sex is determined by

Certain human cancer cells may demonstrate which of the following?

A karyotype

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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