Question 1

In humans,skin color is controlled by several genes.Thus,skin color is a(n)____ characteristic.

Accepted Answer

A)  dominant 
B)  co-dominant 
C)  epistatic 
D)  pleiotropic 
E)  recessive 
A)  dominant 
B)  co-dominant 
C)  epistatic 
D)  pleiotropic 
E)  recessive

Question 2

Which of the following is the most fatal genetic disorder in the United States?

Accepted Answer

A)  cystic fibrosis 
B)  Huntington's disease 
C)  sickle cell anemia 
D)  anhidrotic dysplasia 
E)  fibromyalgia 
A)  cystic fibrosis 
B)  Huntington's disease 
C)  sickle cell anemia 
D)  anhidrotic dysplasia 
E)  fibromyalgia

Question 3

Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb × AaBb).
Examine the figure above,and answer the following question(s).
-In the figure above,how many plants would have the genotype AaBb?

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  6 
E)  9 
A)  1 
B)  3 
C)  5 
D)  6 
E)  9

Question 4

When two alleles of the same gene are different,the individual carrying those alleles is said to be

Accepted Answer

A)  recessive. 
B)  heterozygous. 
C)  phenotypic. 
D)  somatic. 
E)  homozygous. 
A)  recessive. 
B)  heterozygous. 
C)  phenotypic. 
D)  somatic. 
E)  homozygous.

Question 5

In a family pedigree that followed several generations,Gaucher's disease was found in family members every other generation and equally in males and females.Gaucher's disease is most likely a ______ disease.

Accepted Answer

A)  dominant 
B)  recessive 
C)  X-linked 
D)  epistatic 
E)  pleiotrophic 
A)  dominant 
B)  recessive 
C)  X-linked 
D)  epistatic 
E)  pleiotrophic

Question 6

Match the following letters to the number with which they best correspond.
 a.genotype
b.heterozygous
c.dihybrid cross
d.pleiotropic
e.codominance
f.epistasis
g.incomplete dominance
h.syndrome
i.continuous variation
j.aneuploidy
-a chromosome abnormality in which there are too many or too few copies of a particular chromosome

Accepted Answer

The answer of Match the following letters to the number...

Question 7

Approximately,how many gene products are involved in the synthesis of melanin?

Accepted Answer

A)  10 
B)  25 
C)  50 
D)  100 
E)  1000 
A)  10 
B)  25 
C)  50 
D)  100 
E)  1000

Question 8

Amniocentesis is

Accepted Answer

A)  a surgical means of repairing deformities. 
B)  a form of chemotherapy that modifies or inhibits gene expression or the function of gene product. 
C)  used in prenatal diagnosis to detect chromosomal mutations and genetic disorders in embryos. 
D)  a form of gene replacement therapy. 
E)  all of these. 
A)  a surgical means of repairing deformities. 
B)  a form of chemotherapy that modifies or inhibits gene expression or the function of gene product. 
C)  used in prenatal diagnosis to detect chromosomal mutations and genetic disorders in embryos. 
D)  a form of gene replacement therapy. 
E)  all of these.

Question 9

An autosomal recessive disorder

Accepted Answer

A)  requires that only one parent be a carrier. 
B)  displays its symptoms in heterozygotes. 
C)  is more frequent in males than females. 
D)  requires that both parents are carriers. 
E)  only affects females. 
A)  requires that only one parent be a carrier. 
B)  displays its symptoms in heterozygotes. 
C)  is more frequent in males than females. 
D)  requires that both parents are carriers. 
E)  only affects females.

Question 10

Down syndrome

Accepted Answer

A)  risk of occurring increases with the mother's age. 
B)  affects boys more than girls. 
C)  individuals rarely live past 5 years old. 
D)  individuals have normal organ and bone development but are mentally impaired. 
E)  disorder in related to a monosomy of chromosome 21. 
A)  risk of occurring increases with the mother's age. 
B)  affects boys more than girls. 
C)  individuals rarely live past 5 years old. 
D)  individuals have normal organ and bone development but are mentally impaired. 
E)  disorder in related to a monosomy of chromosome 21.

Question 11

If a homozygous dominant long-haired dog is crossed with a homozygous recessive short-haired dog,what will be the phenotype of the offspring?

Accepted Answer

A)  all heterozygous 
B)  half homozygous dominant and half homozygous recessive 
C)  all red 
D)  half red and half white 
E)  more than one of these 
A)  all heterozygous 
B)  half homozygous dominant and half homozygous recessive 
C)  all red 
D)  half red and half white 
E)  more than one of these

Question 12

Blood types (A,B,and O)are controlled by

Accepted Answer

A)  sex-linked genes. 
B)  linked genes. 
C)  incompletely dominant genes. 
D)  multiple alleles. 
E)  simple dominance. 
A)  sex-linked genes. 
B)  linked genes. 
C)  incompletely dominant genes. 
D)  multiple alleles. 
E)  simple dominance.

Question 13

Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb × AaBb).
Examine the figure above,and answer the following question(s).
-In the figure above,what would be the genotype of plant #9?

Accepted Answer

A)  Aabb 
B)  aaBb 
C)  AaBB 
D)  AABB 
E)  aaBB 
A)  Aabb 
B)  aaBb 
C)  AaBB 
D)  AABB 
E)  aaBB

Question 14

If a child has an AB blood type,the parents

Accepted Answer

A)  must both have different blood types. 
B)  must be A and B, but not AB. 
C)  must be AB. 
D)  can be any blood type. 
E)  can have different blood types, but neither can be O. 
A)  must both have different blood types. 
B)  must be A and B, but not AB. 
C)  must be AB. 
D)  can be any blood type. 
E)  can have different blood types, but neither can be O.

Question 15

The switching between asexual and sexual reproduction by water fleas is controlled by

Accepted Answer

A)  epistasis. 
B)  pleiotropy. 
C)  incomplete dominance. 
D)  codominant inheritance. 
E)  environmental effects. 
A)  epistasis. 
B)  pleiotropy. 
C)  incomplete dominance. 
D)  codominant inheritance. 
E)  environmental effects.

Question 16

In cystic fibrosis patients,

Accepted Answer

A)  chlorine ions are stuck inside epithelial cells. 
B)  water is excessively abundant on surfaces of epithelia. 
C)  surfaces of epithelia are relatively dry. 
D)  chlorine ions are stuck inside epithelial cells, and water is excessively abundant on surfaces of epithelia. 
E)  chlorine ions are stuck inside epithelial cells, and surfaces of epithelia are relatively dry. 
A)  chlorine ions are stuck inside epithelial cells. 
B)  water is excessively abundant on surfaces of epithelia. 
C)  surfaces of epithelia are relatively dry. 
D)  chlorine ions are stuck inside epithelial cells, and water is excessively abundant on surfaces of epithelia. 
E)  chlorine ions are stuck inside epithelial cells, and surfaces of epithelia are relatively dry.

Question 17

Six fingers on one hand would be classified as

Accepted Answer

A)  a genetic disorder. 
B)  a disease. 
C)  a syndrome. 
D)  a genetic abnormality. 
E)  an illness. 
A)  a genetic disorder. 
B)  a disease. 
C)  a syndrome. 
D)  a genetic abnormality. 
E)  an illness.

Question 18

Four of the five answers listed below describe gene make up.Select the EXCEPTION.

Accepted Answer

A)  genotype 
B)  homozygous 
C)  heterozygous 
D)  carrier 
E)  phenotype 
A)  genotype 
B)  homozygous 
C)  heterozygous 
D)  carrier 
E)  phenotype

Question 19

The mutation that causes the lighter skin color of all people of European descent was the result of what type of mutation?

Accepted Answer

A)  base-pair substitution 
B)  insertion 
C)  deletion 
D)  whole chromosome duplication 
E)  multiple gene mutations involving several mechanisms 
A)  base-pair substitution 
B)  insertion 
C)  deletion 
D)  whole chromosome duplication 
E)  multiple gene mutations involving several mechanisms

Question 20

Four of the five answers listed below are conditions caused by chromosomal nondisjunction.Select the EXCEPTION.

Accepted Answer

A)  Down syndrome 
B)  Huntington's disease 
C)  Turner syndrome 
D)  Klinefelter's syndrome 
E)  trisomy 18 
A)  Down syndrome 
B)  Huntington's disease 
C)  Turner syndrome 
D)  Klinefelter's syndrome 
E)  trisomy 18

Exam 9: Patterns of Inheritance

In humans,skin color is controlled by several genes.Thus,skin color is a(n)____ characteristic.

Which of the following is the most fatal genetic disorder in the United States?

When two alleles of the same gene are different,the individual carrying those alleles is said to be

In a family pedigree that followed several generations,Gaucher's disease was found in family members every other generation and equally in males and females.Gaucher's disease is most likely a ______ disease.

Approximately,how many gene products are involved in the synthesis of melanin?

Amniocentesis is

An autosomal recessive disorder

Down syndrome

If a homozygous dominant long-haired dog is crossed with a homozygous recessive short-haired dog,what will be the phenotype of the offspring?

Blood types (A,B,and O)are controlled by

Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb × AaBb). Examine the figure above,and answer the following question(s). -In the figure above,what would be the genotype of plant #9?

If a child has an AB blood type,the parents

The switching between asexual and sexual reproduction by water fleas is controlled by

In cystic fibrosis patients,

Six fingers on one hand would be classified as

Four of the five answers listed below describe gene make up.Select the EXCEPTION.

The mutation that causes the lighter skin color of all people of European descent was the result of what type of mutation?

Four of the five answers listed below are conditions caused by chromosomal nondisjunction.Select the EXCEPTION.

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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