Question 1

The allele for white eyes is located at loci 12 while the allele for hairy body is located at loci 16 on one chromosome.The allele for red eyes is located at loci 15 while the allele for normal body is located at loci 17 on a second chromosome.Which allele combination has the greater map distance?

Accepted Answer

A)   white eyes and hairy body
B)   white eyes and normal body
C)   red eyes and normal body
D)   red eyes and hairy body
E)   white eyes and red eyes

Question 2

A long-winged Drosophila female with a gray body mates with a black,short-winged male fly.The phenotypic ratio of the offspring is 1:1:1:1.What is the genotype of the female fly?

Accepted Answer

A)   LlGg
B)   LLGG
C)   llgg
D)   LLgg
E)   llGG

Question 3

Hydrangeas are a flowering plant with large showy blooms.When a plant is grown in aluminum rich soil it has blue flowers; if the same plant is transplanted into soil that is lacking aluminum the flowers produced will be pink.This is an example of

Accepted Answer

A)   environmental effects
B)   codominance
C)   incomplete dominance
D)   polygenetic inheritance
E)   monohybrid inheritance A

Question 4

Martha has a widow's peak and attached earlobes.Martha's dad had a straight hairline and unattached earlobes.What is Martha's genotype?

Accepted Answer

A)   WWEE
B)   WwEE
C)   wwee
D)   WwEe
E)   Wwee

Question 5

A couple has three children,two of which have blonde hair.The third child and both parents have dark hair.What can be determined about the gene for hair color in this family?

Accepted Answer

A)   It is an autosomal recessive trait.
B)   It is an autosomal dominant trait.
C)   It is a sex-linked dominant trait.
D)   It is a sex-linked recessive trait.
E)   It conveys a lethal mutation.

Question 6

Cold weather can change what aspect of a Himalayan rabbit?

Accepted Answer

A)   phenotype
B)   genotype
C)   alleles
D)   sex
E)   rate of genetic mutations

Question 7

Which of the following is an autosomal dominant disorder?

Accepted Answer

A)   Huntington's disease
B)   Sickle-cell disease
C)   Alkaptonuria
D)   Cystic fibrosis
E)   Methemoglobinemia

Question 8

What are all possible gametes that can be produced by an individual with the following genotype,FFGg?

Accepted Answer

A)   Fg, FG
B)   FF
C)   Fg
D)   FG, Fg, fG, fg
E)   Fg, fG

Question 9

Morgan breeds and sells snakes.He knows that he can make the most money by breeding and selling albino snakes.Albinism is a recessive trait.His female albino corn snake just produced six offspring.Two displayed normal coloration and four were albino.What do you know about the genotype of the baby snakes with the normal coloration?

Accepted Answer

A)   They must be homozygous dominant.
B)   They must be homozygous recessive.
C)   They must be heterozygous.
D)   They could be either heterozygous or homozygous dominant.
E)   There is not enough information to determine their genotype but we know that they must carry the dominant allele. C

Question 10

A woman with Type AB blood marries a man with Type B blood.If they have children,what are all the possible blood types for these individuals?

Accepted Answer

A)   AB only
B)   AB, AA, AO, and BO
C)   AB, BB, AO, and BO
D)   BB only
E)   AA, BB, and AB

Question 11

Unattached earlobes (EE or Ee) are dominant over attached earlobes (ee) .A couple both have unattached earlobes.Both notice that one of their parents on both sides have attached earlobes (ee) .Therefore,they correctly assume that they are carriers for attached earlobes (Ee) .If the couple proceeds to have four children,then

Accepted Answer

A)   they can be certain that three will be heterozygous and one homozygous recessive.
B)   if the first three are heterozygous, the fourth must be homozygous recessive.
C)   the children must repeat the grandparents' genotype (Ee) .
D)   all children must have unattached earlobes since both parents possess the dominant gene for it.
E)   two heterozygous, one homozygous dominant, and one homozygous recessive is a likely outcome, but all heterozygous, or two, three or all four homozygous is also possible.

Question 12

In a dihybrid cross where both parents are heterozygous,the phenotypic ratio is

Accepted Answer

A)   1:2:1.
B)   9:3:3:1.
C)   1:1:1.
D)   3:1.
E)   1:1:1:1.

Question 13

The outcome of a genetic cross involving eye color and body type is predicted to have a 25%: 25%: 25%: 25% ratio.When bred the organisms produced offspring with the following ratio 45%: 45%: 3%: 3%.These results are most likely due to:

Accepted Answer

A)   the two genes in question being linked on the same chromosome
B)   a spontaneous mutation within the offspring
C)   pure chance
D)   an innacurate prediction for the 25%: 25%: 25%: 25% ratio
E)   the two genes being on separate chromosomes

Question 14

Referring to the figure shown here,which of the following are homologous chromosomes?

Accepted Answer

A)   Figure B with one chromosome having both capital and lowercase letters.
B)   Figure B as is.
C)   Figure A with different letters on one of the chromosomes.
D)   Figure A with the same letters but the order randomized.
E)   Figure B with different letters on each chromosome. B

Question 15

Parents with the dominant phenotype cannot have offspring with the recessive phenotype.

Accepted Answer

A)   True, because the dominant gene must be passed down from each parent.
B)   True, because at least one dominant gene will be passed down from each parent.
C)   False, because one parent could carry the recessive allele.
D)   False, because both parents could carry the recessive allele.
E)   True, because both parents have the dominant allele.

Question 16

What does true-breeding mean?

Accepted Answer

A)   The organism has 2 parents.
B)   The organism can be cross-pollinated.
C)   The organism is self-pollinated.
D)   The organism is easy to cultivate.
E)   The organism cannot be cultivated.

Question 17

A heterozygote for a trait exhibiting incomplete dominance will

Accepted Answer

A)   express the dominant trait.
B)   express the recessive trait.
C)   exhibit an intermediate phenotype.
D)   express both alleles.
E)   exhibit an intermediate genotype.

Question 18

Traits that are controlled by several sets or pairs of alleles,such as skin color and height in humans,are the result of what form of inheritance?

Accepted Answer

A)   polygenic
B)   incomplete dominance
C)   multiple allele systems
D)   simple Mendelian inheritance
E)   codominance

Question 19

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?

Accepted Answer

A)   Phenylketonuria (PKU) 
B)   Marfan syndrome
C)   Huntington disease
D)   Sickle cell disease
E)   Cystic fibrosis (CF)

Question 20

Alleles that are linked on the same chromosome will assort independently during Meiosis.

Accepted Answer

A) True 
 B)False

Exam 10: Patterns of Inheritance

The allele for white eyes is located at loci 12 while the allele for hairy body is located at loci 16 on one chromosome.The allele for red eyes is located at loci 15 while the allele for normal body is located at loci 17 on a second chromosome.Which allele combination has the greater map distance?

Correct Answer
verified

A long-winged Drosophila female with a gray body mates with a black,short-winged male fly.The phenotypic ratio of the offspring is 1:1:1:1.What is the genotype of the female fly?

Correct Answer
verified

Hydrangeas are a flowering plant with large showy blooms.When a plant is grown in aluminum rich soil it has blue flowers; if the same plant is transplanted into soil that is lacking aluminum the flowers produced will be pink.This is an example of

Correct Answer
verified
A

Martha has a widow's peak and attached earlobes.Martha's dad had a straight hairline and unattached earlobes.What is Martha's genotype?

Correct Answer
verified

A couple has three children,two of which have blonde hair.The third child and both parents have dark hair.What can be determined about the gene for hair color in this family?

Correct Answer
verified

Cold weather can change what aspect of a Himalayan rabbit?

Correct Answer
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Which of the following is an autosomal dominant disorder?

Correct Answer
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What are all possible gametes that can be produced by an individual with the following genotype,FFGg?

Correct Answer
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C

A woman with Type AB blood marries a man with Type B blood.If they have children,what are all the possible blood types for these individuals?

Correct Answer
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Correct Answer
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In a dihybrid cross where both parents are heterozygous,the phenotypic ratio is

Correct Answer
verified

The outcome of a genetic cross involving eye color and body type is predicted to have a 25%: 25%: 25%: 25% ratio.When bred the organisms produced offspring with the following ratio 45%: 45%: 3%: 3%.These results are most likely due to:

Correct Answer
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Referring to the figure shown here,which of the following are homologous chromosomes?

Correct Answer
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B

Parents with the dominant phenotype cannot have offspring with the recessive phenotype.

Correct Answer
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What does true-breeding mean?

Correct Answer
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A heterozygote for a trait exhibiting incomplete dominance will

Correct Answer
verified

Traits that are controlled by several sets or pairs of alleles,such as skin color and height in humans,are the result of what form of inheritance?

Correct Answer
verified

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?

Correct Answer
verified

Alleles that are linked on the same chromosome will assort independently during Meiosis.

Correct Answer
verified

Exam 10: Patterns of Inheritance

The allele for white eyes is located at loci 12 while the allele for hairy body is located at loci 16 on one chromosome.The allele for red eyes is located at loci 15 while the allele for normal body is located at loci 17 on a second chromosome.Which allele combination has the greater map distance?

Correct AnswerverifiedShow Answer

A long-winged Drosophila female with a gray body mates with a black,short-winged male fly.The phenotypic ratio of the offspring is 1:1:1:1.What is the genotype of the female fly?

Correct AnswerverifiedShow Answer

Hydrangeas are a flowering plant with large showy blooms.When a plant is grown in aluminum rich soil it has blue flowers; if the same plant is transplanted into soil that is lacking aluminum the flowers produced will be pink.This is an example of

Correct AnswerverifiedA

Martha has a widow's peak and attached earlobes.Martha's dad had a straight hairline and unattached earlobes.What is Martha's genotype?

Correct AnswerverifiedShow Answer

A couple has three children,two of which have blonde hair.The third child and both parents have dark hair.What can be determined about the gene for hair color in this family?

Correct AnswerverifiedShow Answer

Cold weather can change what aspect of a Himalayan rabbit?

Correct AnswerverifiedShow Answer

Which of the following is an autosomal dominant disorder?

Correct AnswerverifiedShow Answer

What are all possible gametes that can be produced by an individual with the following genotype,FFGg?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedC

A woman with Type AB blood marries a man with Type B blood.If they have children,what are all the possible blood types for these individuals?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In a dihybrid cross where both parents are heterozygous,the phenotypic ratio is

Correct AnswerverifiedShow Answer

The outcome of a genetic cross involving eye color and body type is predicted to have a 25%: 25%: 25%: 25% ratio.When bred the organisms produced offspring with the following ratio 45%: 45%: 3%: 3%.These results are most likely due to:

Correct AnswerverifiedShow Answer

Referring to the figure shown here,which of the following are homologous chromosomes?

Correct AnswerverifiedB

Parents with the dominant phenotype cannot have offspring with the recessive phenotype.

Correct AnswerverifiedShow Answer

What does true-breeding mean?

Correct AnswerverifiedShow Answer

A heterozygote for a trait exhibiting incomplete dominance will

Correct AnswerverifiedShow Answer

Traits that are controlled by several sets or pairs of alleles,such as skin color and height in humans,are the result of what form of inheritance?

Correct AnswerverifiedShow Answer

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?

Correct AnswerverifiedShow Answer

Alleles that are linked on the same chromosome will assort independently during Meiosis.

Correct AnswerverifiedShow Answer

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A

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C

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B

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