Question 1

What type of disorder is hemophilia classified as?

Accepted Answer

A)   sex-linked recessive
B)   sex-linked dominant
C)   codominance
D)   polygenic
E)   pleiotropicF) A) and B)
G) C) and D)

Question 2

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.F) A) and C)
G) C) and E)

Question 3

Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of

Accepted Answer

A)   a multifactorial trait.
B)   polygenic inheritance.
C)   pleiotropy.
D)   codominance.
E)   incomplete dominance.F) B) and C)
G) C) and E)

Question 4

Ryan has type A blood and is color-blind an X-linked recessive trait) . Which of the following combinations are possible for his parents?

Accepted Answer

A)   1, 2, and 3
B)   1 and 2
C)   1, 3, and 4
D)   1, 2, 3, 4, and 5
E)   1, 3, 4, and 5F) B) and E)
G) C) and E)

Question 5

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele. Morgan mates the snake with an albino female, and four normally pigmented offspring are produced. Morgan rushes back to the snake dealer and demands his money back stating that the male he bought is not heterozygous for the albino allele because all of its offspring had normal pigmentation.

Accepted Answer

A)   True, because according to the laws of probability, at least one of the offspring should have been albino.
B)   True, because 50% of all offspring produced must be albino.
C)   False, because for each offspring, there is a 50% chance that it will have normal pigmentation.
D)   False, because a heterozygous male will only pass the dominant allele to its offspring.
E)   True, because if at least one parent is homozygous recessive, at least one of their offspring must also show the recessive trait.F) C) and E)
G) B) and C)

Question 6

Martha has a widow's peak dominant trait)  and attached earlobes recessive trait) . 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)   WweeF) C) and D)
G) A) and C)

Question 7

If an individual expresses a dominant disease, which of the following is true?

Accepted Answer

A)   All of his children will always inherit the disease.
B)   He will pass this disease to all of his daughters.
C)   There is at least a 50% probability that his children will inherit the disease.
D)   There is a 100% possibility that his sons will inherit this disease.
E)   None of his children will inherit the disease unless his wife also has the disease.F) A) and B)
G) None of the above

Question 8

Which of the following is a sex-linked recessive disorder?

Accepted Answer

A)   color blindness
B)   Marfan syndrome
C)   sickle-cell disease
D)   cystic fibrosis
E)   alkaptonuriaF) B) and D)
G) A) and D)

Question 9

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 inaccurate prediction for the 25%: 25%: 25%: 25% ratio.
E)   the two genes being on separate chromosomes.F) B) and E)
G) None of the above

Question 10

A long-winged Drosophila female with a gray body heterozygotic for both traits)  mates with a black, short-winged male fly recessive for both traits) . 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)   llGGF) B) and D)
G) A) and D)

Question 11

Which of the following is not a correct match?

Accepted Answer

A)   pollen - male
B)   stigma - female
C)   anther - female
D)   ovule - female
E)   stamen - maleF) All of the above
G) A) and D)

Question 12

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)   Blonde hair color is an autosomal recessive trait.
B)   Blonde hair color is an autosomal dominant trait.
C)   Blonde hair color is a sex-linked dominant trait.
D)   Blonde hair color is a sex-linked recessive trait.
E)   Blonde hair color conveys a lethal mutation.F) B) and D)
G) A) and E)

Question 13

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 the children?

Accepted Answer

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

Question 14

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 father?

Accepted Answer

A)   He must be homozygous dominant.
B)   He must be heterozygous.
C)   He must be homozygous recessive.
D)   He could be either heterozygous or homozygous dominant.
E)   There is not enough information to determine the father's genotype.F) A) and C)
G) B) and C)

Question 15

If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of ________. However, if the calf has black and white spots, this would be an example of ________.

Accepted Answer

A)   incomplete dominance; a sex-linked trait
B)   complete dominance; polygenic trait
C)   codominance; homology
D)   incomplete dominance; codominance
E)   a sex-linked trait; a recessive traitF) A) and B)
G) None of the above

Question 16

Which of the following is true about an individual with the chromosomes shown in this figure?

Accepted Answer

A)   All offspring will have the dominant phenotype for each trait.
B)   All offspring will have the recessive phenotype for each trait.
C)   A maximum of four different gametes are possible with four traits.
D)   The individual is heterozygous for all traits.
E)   The individual is homozygous for at least one trait.F) A) and C)
G) A) and D)

Question 17

On one chromosome, the allele for white eyes is located at loci 12 and the allele for a hairy body is located at loci 16. On a second chromosome, the allele for red eyes is located at loci 15 and the allele for a normal body is located at loci 17. 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 eyesF) A) and D)
G) All of the above

Question 18

A red-eyed male Drosophila mates with a red-eyed female Drosophila. One of the female's parents had white eyes. What proportion of the male offspring will have white eyes?

Accepted Answer

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

Question 19

Which of the following is not true about blood types?

Accepted Answer

A)   IA represents antigen A on red blood cells.
B)   One person with AB blood has two different antigens on his red blood cells.
C)   The allele representing blood type O is recessive.
D)   This is an example of a multiple allele trait and an individual can have up to three different alleles.
E)   Blood types exhibit codominance and are also an example of a multiple allele trait.F) A) and B)
G) None of the above

Question 20

People who suffer from Marfan syndrome have disproportionately long limbs, a weakened aorta, and poor eyesight. All of these characteristics are due to the production of abnormal connective tissue, resulting from a single defective gene. Marfan syndrome is an example of

Accepted Answer

A)   pleiotropy.
B)   polygenic inheritance.
C)   multiple allelism.
D)   epistasis.
E)   codominance.F) C) and D)
G) A) and E)

Exam 10: Patterns of Inheritance

What type of disorder is hemophilia classified as?

Correct Answer
verified

Which of the following is a sex-linked recessive disorder?

Correct Answer
verified

Ryan has type A blood and is color-blind an X-linked recessive trait) . Which of the following combinations are possible for his parents?

Correct Answer
verified

A red-eyed male Drosophila mates with a red-eyed female Drosophila. One of the female's parents had white eyes. What proportion of the male offspring will have white eyes?

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
verified

Which of the following is true about an individual with the chromosomes shown in this figure?

Correct Answer
verified

Correct Answer
verified

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 the children?

Correct Answer
verified

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

Which of the following is not true about blood types?

Correct Answer
verified

Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of . However, if the calf has black and white spots, this would be an example of .

Correct Answer
verified

Which of the following is not a correct match?

Correct Answer
verified

If an individual expresses a dominant disease, which of the following is true?

Correct Answer
verified

People who suffer from Marfan syndrome have disproportionately long limbs, a weakened aorta, and poor eyesight. All of these characteristics are due to the production of abnormal connective tissue, resulting from a single defective gene. Marfan syndrome is an example of

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Exam 10: Patterns of Inheritance

What type of disorder is hemophilia classified as?

Correct AnswerverifiedShow Answer

Which of the following is a sex-linked recessive disorder?

Correct AnswerverifiedShow Answer

Ryan has type A blood and is color-blind an X-linked recessive trait) . Which of the following combinations are possible for his parents?

Correct AnswerverifiedShow Answer

A red-eyed male Drosophila mates with a red-eyed female Drosophila. One of the female's parents had white eyes. What proportion of the male offspring will have white eyes?

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

Which of the following is true about an individual with the chromosomes shown in this figure?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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 the children?

Correct AnswerverifiedShow Answer

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

Which of the following is not true about blood types?

Correct AnswerverifiedShow Answer

Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of ________. However, if the calf has black and white spots, this would be an example of ________.

Correct AnswerverifiedShow Answer

Which of the following is not a correct match?

Correct AnswerverifiedShow Answer

If an individual expresses a dominant disease, which of the following is true?

Correct AnswerverifiedShow Answer

People who suffer from Marfan syndrome have disproportionately long limbs, a weakened aorta, and poor eyesight. All of these characteristics are due to the production of abnormal connective tissue, resulting from a single defective gene. Marfan syndrome is an example of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of . However, if the calf has black and white spots, this would be an example of .

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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