Question 1

If a true-breeding tall pea plant is crossed with a tall pea plant of unknown parentage. Which of the following is correct?

Accepted Answer

A)  All of the offspring (F1) will be short. 
B)  Over several generations, no short individuals will appear. 
C)  Some short individuals may appear in the F2 generation. 
D)  It is impossible to determine based on the information provided. 
E)  Some of the F1 generation will be short. 
A)  All of the offspring (F1) will be short. 
B)  Over several generations, no short individuals will appear. 
C)  Some short individuals may appear in the F2 generation. 
D)  It is impossible to determine based on the information provided. 
E)  Some of the F1 generation will be short. C

Question 2

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 
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 A

Question 3

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. 
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. C

Question 4

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. 
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.

Question 5

A cow with black and white patches is produced from a white bull and a black cow. This is an example of

Accepted Answer

A)  incomplete dominance. 
B)  Codominance. 
C)  dominance/recessive trait. 
D)  Polygenic. 
E)  Pleiotropy. 
A)  incomplete dominance. 
B)  Codominance. 
C)  dominance/recessive trait. 
D)  Polygenic. 
E)  Pleiotropy.

Question 6

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 6 offspring. Two displayed normal coloration and 4 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. 
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.

Question 7

Alleles are

Accepted Answer

A)  dominant traits. 
B)  recessive traits. 
C)  2 versions of the same trait. 
D)  alternate versions of the same trait. 
E)  exact copies of the same trait. 
A)  dominant traits. 
B)  recessive traits. 
C)  2 versions of the same trait. 
D)  alternate versions of the same trait. 
E)  exact copies of the same trait.

Question 8

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 6 offspring. Two displayed normal coloration and 4 were albino. What is the chance that another offspring produced by the same parents will be albino?

Accepted Answer

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

Question 9

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 trait 
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 trait

Question 10

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

Question 11

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. 
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 12

Alleles A, B, and C are found on the same chromosome with alleles a, b, and c on the homologous chromosome. If alleles A and C on one homologous chromosome, and a and c on the other homologous chromosome are typically inherited together, this suggests that

Accepted Answer

A)  A and C alleles are closer together than the a and c alleles. 
B)  the order of the alleles on one homologous chromosome is A, B, C. 
C)  alleles a and c are closer together than alleles c and b. 
D)  a recombinant gamete would contain alleles A, B, and C. 
E)  crossing over often occurs between sister chromatids. 
A)  A and C alleles are closer together than the a and c alleles. 
B)  the order of the alleles on one homologous chromosome is A, B, C. 
C)  alleles a and c are closer together than alleles c and b. 
D)  a recombinant gamete would contain alleles A, B, and C. 
E)  crossing over often occurs between sister chromatids.

Question 13

Martha has widow's peak and attached earlobes. Martha's dad had a straight hairline and unattached earlobes. If Martha marries a man that is heterozygous for both traits, what is the probability that they will have a child with a widow's peak and attached earlobes?

Accepted Answer

A)  1/16 
B)  1/8 
C)  1/4 
D)  1/2 
E)  3/4 
A)  1/16 
B)  1/8 
C)  1/4 
D)  1/2 
E)  3/4

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 6 offspring. Two displayed normal coloration and 4 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. 
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.

Question 15

In a monohybrid cross, how many traits are examined?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 16

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

Question 17

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. 
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 18

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

Question 19

Which of the following is NOT true about blood types?

Accepted Answer

A)  IA represents antigen A on red blood cells. 
B)  A 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 3 different alleles. 
E)  Blood types exhibit codominance and are also an example of a multiple allele trait. 
A)  IA represents antigen A on red blood cells. 
B)  A 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 3 different alleles. 
E)  Blood types exhibit codominance and are also an example of a multiple allele trait.

Question 20

During meiosis, each pair of alleles on the homologous chromosomes sorts independently from all other pairs of alleles. This statement corresponds to

Accepted Answer

A)  the rule of multiplication. 
B)  the law of segregation. 
C)  the law of probability. 
D)  gene theory. 
E)  the law of independent assortment. 
A)  the rule of multiplication. 
B)  the law of segregation. 
C)  the law of probability. 
D)  gene theory. 
E)  the law of independent assortment.

Exam 10: Patterns of Inheritance

If a true-breeding tall pea plant is crossed with a tall pea plant of unknown parentage. Which of the following is correct?

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

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

A cow with black and white patches is produced from a white bull and a black cow. This is an example of

Alleles are

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 _______________.

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?

What does true-breeding mean?

Alleles A, B, and C are found on the same chromosome with alleles a, b, and c on the homologous chromosome. If alleles A and C on one homologous chromosome, and a and c on the other homologous chromosome are typically inherited together, this suggests that

Martha has widow's peak and attached earlobes. Martha's dad had a straight hairline and unattached earlobes. If Martha marries a man that is heterozygous for both traits, what is the probability that they will have a child with a widow's peak and attached earlobes?

In a monohybrid cross, how many traits are examined?

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?

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

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?

Which of the following is NOT true about blood types?

During meiosis, each pair of alleles on the homologous chromosomes sorts independently from all other pairs of alleles. This statement corresponds to

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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 _____.