Question 1

If an individual has a XYY genotype,they are classified as having

Accepted Answer

A)  Down syndrome. 
B)  cri du chat syndrome. 
C)  Turner syndrome. 
D)  Klinefelter syndrome. 
E)  Jacobs syndrome. 
A)  Down syndrome. 
B)  cri du chat syndrome. 
C)  Turner syndrome. 
D)  Klinefelter syndrome. 
E)  Jacobs syndrome. E

Question 2

Color-blindness is inherited as an X-linked recessive trait.A male who is color-blind marries a heterozygous woman.What percent of their total children will be color-blind?

Accepted Answer

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

Question 3

A male who is color-blind marries a heterozygous woman.What percent of their male children will be color-blind?

Accepted Answer

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

Question 4

A female that does not undergo puberty or menstruate or lacks breast development may have

Accepted Answer

A)  Klinefelter syndrome. 
B)  Down syndrome. 
C)  cri du chat syndrome. 
D)  Turner syndrome. 
E)  poly-X female state. 
A)  Klinefelter syndrome. 
B)  Down syndrome. 
C)  cri du chat syndrome. 
D)  Turner syndrome. 
E)  poly-X female state.

Question 5

Which refers to the loss of a complete chromosome?

Accepted Answer

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

Question 6

The cri du chat syndrome represents a chromosomal mutation type termed

Accepted Answer

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

Question 7

Which disorder is characterized by a lack of the protein dystrophin?

Accepted Answer

A)  hemophilia 
B)  color blindness 
C)  muscular dystrophy 
D)  Down syndrome 
E)  cystic fibrosis 
A)  hemophilia 
B)  color blindness 
C)  muscular dystrophy 
D)  Down syndrome 
E)  cystic fibrosis

Question 8

Which of the following sex-linked disorders is characterized by an abnormal number of repeat sequences in the genome?

Accepted Answer

A)  fragile X syndrome 
B)  hemophilia 
C)  color blindness 
D)  Duchenne muscular dystrophy 
E)  none of these 
A)  fragile X syndrome 
B)  hemophilia 
C)  color blindness 
D)  Duchenne muscular dystrophy 
E)  none of these

Question 9

The ____ gene causes mental retardation by increasing the levels of purines in the blood.

Accepted Answer

A)  Gart 
B)  Dart 
C)  RFLP 
D)  SRY 
E)  Barr 
A)  Gart 
B)  Dart 
C)  RFLP 
D)  SRY 
E)  Barr

Question 10

The most common autosomal abnormality present in people is

Accepted Answer

A)  XXX. 
B)  XXY. 
C)  XO. 
D)  a deletion in chromosome 5. 
E)  an extra chromosome 21. 
A)  XXX. 
B)  XXY. 
C)  XO. 
D)  a deletion in chromosome 5. 
E)  an extra chromosome 21.

Question 11

If an individual has a XXY genotype,they are classified as having

Accepted Answer

A)  Jacobs syndrome. 
B)  cri du chat syndrome. 
C)  Turner syndrome. 
D)  Klinefelter syndrome. 
E)  a poly-X female state. 
A)  Jacobs syndrome. 
B)  cri du chat syndrome. 
C)  Turner syndrome. 
D)  Klinefelter syndrome. 
E)  a poly-X female state.

Question 12

Hemophilia (h)is a sex-linked recessive trait.If a hemophiliac male marries a carrier female,

Accepted Answer

A)  50% of their daughters will be hemophiliac. 
B)  75% of their daughters will be hemophiliac. 
C)  25% of their daughters will be hemophiliac. 
D)  25% of their sons will be hemophiliac. 
E)  75% of their sons will be hemophiliac. 
A)  50% of their daughters will be hemophiliac. 
B)  75% of their daughters will be hemophiliac. 
C)  25% of their daughters will be hemophiliac. 
D)  25% of their sons will be hemophiliac. 
E)  75% of their sons will be hemophiliac.

Question 13

Which statement is true regarding the Barr body?

Accepted Answer

A)  It is found in the nuclei of females. 
B)  It is found in the nuclei of males. 
C)  It is found in the cytoplasm of males. 
D)  It is found in the cytoplasm of females. 
E)  It is a condensed inactive Y chromosome. 
A)  It is found in the nuclei of females. 
B)  It is found in the nuclei of males. 
C)  It is found in the cytoplasm of males. 
D)  It is found in the cytoplasm of females. 
E)  It is a condensed inactive Y chromosome.

Question 14

If a person has a portion of number 5 chromosome missing,they may have

Accepted Answer

A)  Down syndrome. 
B)  cri du chat syndrome. 
C)  Turner syndrome. 
D)  Klinefelter syndrome. 
E)  Jacobs syndrome. 
A)  Down syndrome. 
B)  cri du chat syndrome. 
C)  Turner syndrome. 
D)  Klinefelter syndrome. 
E)  Jacobs syndrome.

Question 15

The location of a gene on a chromosome is called

Accepted Answer

A)  A locus 
B)  Homologous 
C)  A linkage map 
D)  A linkage group 
E)  An allele 
A)  A locus 
B)  Homologous 
C)  A linkage map 
D)  A linkage group 
E)  An allele

Question 16

Which statement is NOT true about Down syndrome?

Accepted Answer

A)  It is caused by a third copy of chromosome 21. 
B)  Greatly increased incidence occurs with fathers over age 40. 
C)  It is usually associated with chromosomal nondisjunction in meiosis. 
D)  Characteristics include mental retardation and extra eyelid folds. 
E)  Affected individuals display mental retardation. 
A)  It is caused by a third copy of chromosome 21. 
B)  Greatly increased incidence occurs with fathers over age 40. 
C)  It is usually associated with chromosomal nondisjunction in meiosis. 
D)  Characteristics include mental retardation and extra eyelid folds. 
E)  Affected individuals display mental retardation.

Question 17

If a chromosomal segment is turned around 180$\circ$,the chromosomal mutation is termed a(n)

Accepted Answer

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

Question 18

Which of the following sex-linked diseases is characterized by the absence of a clotting factor?

Accepted Answer

A)  hemophilia 
B)  fragile X syndrome 
C)  color blindness 
D)  Duchenne muscular dystrophy 
E)  none of these 
A)  hemophilia 
B)  fragile X syndrome 
C)  color blindness 
D)  Duchenne muscular dystrophy 
E)  none of these

Question 19

Which of the following conditions is NOT due to a sex-linked gene?

Accepted Answer

A)  color blindness 
B)  hemophilia 
C)  muscular dystrophy 
D)  Klinefelter syndrome 
E)  inability to see red or green 
A)  color blindness 
B)  hemophilia 
C)  muscular dystrophy 
D)  Klinefelter syndrome 
E)  inability to see red or green

Question 20

Which refers to the loss of a portion of a chromosome?

Accepted Answer

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

Exam 24: Chromosomal Basis of Inheritance

If an individual has a XYY genotype,they are classified as having

Color-blindness is inherited as an X-linked recessive trait.A male who is color-blind marries a heterozygous woman.What percent of their total children will be color-blind?

A male who is color-blind marries a heterozygous woman.What percent of their male children will be color-blind?

A female that does not undergo puberty or menstruate or lacks breast development may have

Which refers to the loss of a complete chromosome?

The cri du chat syndrome represents a chromosomal mutation type termed

Which disorder is characterized by a lack of the protein dystrophin?

Which of the following sex-linked disorders is characterized by an abnormal number of repeat sequences in the genome?

The ____ gene causes mental retardation by increasing the levels of purines in the blood.

The most common autosomal abnormality present in people is

If an individual has a XXY genotype,they are classified as having

Hemophilia (h)is a sex-linked recessive trait.If a hemophiliac male marries a carrier female,

Which statement is true regarding the Barr body?

If a person has a portion of number 5 chromosome missing,they may have

The location of a gene on a chromosome is called

Which statement is NOT true about Down syndrome?

If a chromosomal segment is turned around 180 ∘\circ∘ ,the chromosomal mutation is termed a(n)

Which of the following sex-linked diseases is characterized by the absence of a clotting factor?

Which of the following conditions is NOT due to a sex-linked gene?

Which refers to the loss of a portion of a chromosome?

The Study of Life

The Molecules of Cells

Cell Structure and Function

Membrane Structure and Function

Cell Division

Metabolism: Energy and Enzymes

Cellular Respiration

Photosynthesis

Plant Organization

Plant Reproduction and Responses

Human Organization

Cardiovascular System

Lymphatic and Immune Systems

Digestive System and Nutrition

Respiratory System

Urinary System and Excretion

Nervous System

Senses

Musculoskeletal System

Endocrine System

Reproductive System

Development and Aging

Patterns of Gene Inheritance

DNA Structure and Gene Expression

Biotechnology and Genomics

Evolution of Life

Microbiology

Protists and Fungi

Plants

Animals: the Invertebrates

Animals: Chordates and Vertebrates

Behavioral Ecology

Population and Community Ecology

Nature of Ecosystems

Major Ecosystems of the Biosphere

Conservation Biology

Filters

If a chromosomal segment is turned around 180^$\circ$,the chromosomal mutation is termed a(n)