Question 1

In cattle, consider that the lack of horns is dominant to the presence of horns. A bull without horns is crossed with a horned cow. All eight offspring lack horns. The bull is most likely

Accepted Answer

A)   homozygous dominant.
B)   homozygous recessive.
C)   heterozygous.
D)   sex-lined recessive.
E)   heterozygous recessive.F) C) and D)
G) None of the above

Question 2

A cross is made between two parents with genotypes AaBB and aabb. If there are 32 offspring, how many of them would be expected to exhibit both dominant characteristics?

Accepted Answer

A)   32
B)   24
C)   16
D)   8
E)   0F) B) and C)
G) None of the above

Question 3

In which kind of cross could you expect to find ratios of 1:1:1:1 among the offspring?

Accepted Answer

A)   monohybrid cross
B)   dihybrid cross
C)   one-trait testcross
D)   two-trait testcross
E)   No cross will yield offspring in 1:1:1:1 ratios.F) A) and E)
G) A) and D)

Question 4

In the following pedigree, what does the colored circle indicate?

Accepted Answer

A)   an affected father
B)   an affected mother
C)   an affected daughter
D)   an affected son
E)   an affected cousinF) C) and D)
G) D) and E)

Question 5

An individual's physical characteristics, or microscopic and metabolic characteristics, are known as their

Accepted Answer

A)   phenotype.
B)   genotype.
C)   alleles.
D)   traits.
E)   pedigree.F) A) and D)
G) B) and D)

Question 6

Which of the following would be considered a heterozygous dihybrid genotype?

Accepted Answer

A)   Ww
B)   sS
C)   WWSs
D)   WWss
E)   WwSsF) C) and E)
G) A) and D)

Question 7

Mendel carried out most of his research with

Accepted Answer

A)   livestock.
B)   pea plants.
C)   guinea pigs.
D)   fruit flies.
E)   bacteria.F) A) and C)
G) A) and D)

Question 8

In guinea pigs, B = black, b = brown, S = short hair, s = long hair. A guinea pig heterozygous for both traits is mated with a brown, short-haired guinea pig whose mother had long hair. What phenotypic ratio is expected in the offspring?

Accepted Answer

A)   9 black long hair, 3 black short hair, 3 brown long hair, 1 brown short hair.
B)   9 black short hair, 6 black long hair, 3 brown long hair, 1 black short hair.
C)   6 black short hair, 1 black long hair, 6 brown short hair, 2 brown long hair.
D)   6 brown short hair, 6 black long hair, 2 brown long hair, 2 black short hair.
E)   1 black short hair, 1 black long hair, 1 brown short hair, 1 brown long hair.F) A) and B)
G) B) and E)

Question 9

Which of the following is true according to Mendel's law of segregation?

Accepted Answer

A)   Each individual contains two alleles for each trait.
B)   Fertilization restores the presence of two alleles.
C)   Alleles separate from each other during gamete formation.
D)   Each gamete contains one copy of each allele.
E)   All of the answer choices are true about Mendel's law of segregation.F) A) and C)
G) B) and E)

Question 10

A pheasant breeder starts with two birds in the P generation, one of which is AA and the other is aa. If he takes two of the birds from the F1 generation and breeds them together, what genotypes can he expect in his F2 offspring?

Accepted Answer

A)   AA and Aa
B)   Aa and aa
C)   AA, Aa, and aa
D)   AA only
E)   Aa onlyF) A) and B)
G) C) and E)

Question 11

What genotypic ratio would result from a cross between two individuals who are both heterozygous for a trait?

Accepted Answer

A)   100% homozygous dominant
B)   100% homozygous recessive
C)   50% homozygous dominant, 50% homozygous recessive
D)   25% homozygous dominant, 50% heterozygous, 25% homozygous recessive
E)   50% homozygous dominant, 50% heterozygousF) C) and D)
G) A) and B)

Question 12

A cross that involves two traits is called a

Accepted Answer

A)   monohybrid cross.
B)   dihybrid cross.
C)   Punnett square.
D)   testcross.
E)   trihybrid cross.F) A) and D)
G) A) and C)

Question 13

Albinism is inherited as a recessive trait. An albino woman is married to a man with normal coloring and their first child is an albino. What was the genotype of the man?

Accepted Answer

A)   homozygous dominant
B)   heterozygous
C)   homozygous recessive
D)   incompletely dominant
E)   sex-linked recessiveF) D) and E)
G) B) and D)

Exam 23: Patterns of Gene Inheritance

Albinism is inherited as a recessive trait. An albino woman is married to a man with normal coloring and their first child is an albino. What was the genotype of the man?

Correct Answer
verified

A cross that involves two traits is called a

Correct Answer
verified

In the following pedigree, what does the colored circle indicate?

Correct Answer
verified

An individual's physical characteristics, or microscopic and metabolic characteristics, are known as their

Correct Answer
verified

In which kind of cross could you expect to find ratios of 1:1:1:1 among the offspring?

Correct Answer
verified

A pheasant breeder starts with two birds in the P generation, one of which is AA and the other is aa. If he takes two of the birds from the F₁ generation and breeds them together, what genotypes can he expect in his F₂ offspring?

Correct Answer
verified

In cattle, consider that the lack of horns is dominant to the presence of horns. A bull without horns is crossed with a horned cow. All eight offspring lack horns. The bull is most likely

Correct Answer
verified

Which of the following would be considered a heterozygous dihybrid genotype?

Correct Answer
verified

What genotypic ratio would result from a cross between two individuals who are both heterozygous for a trait?

Correct Answer
verified

A cross is made between two parents with genotypes AaBB and aabb. If there are 32 offspring, how many of them would be expected to exhibit both dominant characteristics?

Correct Answer
verified

Mendel carried out most of his research with

Correct Answer
verified

In guinea pigs, B = black, b = brown, S = short hair, s = long hair. A guinea pig heterozygous for both traits is mated with a brown, short-haired guinea pig whose mother had long hair. What phenotypic ratio is expected in the offspring?

Correct Answer
verified

Which of the following is true according to Mendel's law of segregation?

Correct Answer
verified

Exam 23: Patterns of Gene Inheritance

Albinism is inherited as a recessive trait. An albino woman is married to a man with normal coloring and their first child is an albino. What was the genotype of the man?

Correct AnswerverifiedShow Answer

A cross that involves two traits is called a

Correct AnswerverifiedShow Answer

In the following pedigree, what does the colored circle indicate?

Correct AnswerverifiedShow Answer

An individual's physical characteristics, or microscopic and metabolic characteristics, are known as their

Correct AnswerverifiedShow Answer

In which kind of cross could you expect to find ratios of 1:1:1:1 among the offspring?

Correct AnswerverifiedShow Answer

A pheasant breeder starts with two birds in the P generation, one of which is AA and the other is aa. If he takes two of the birds from the F1 generation and breeds them together, what genotypes can he expect in his F2 offspring?

Correct AnswerverifiedShow Answer

In cattle, consider that the lack of horns is dominant to the presence of horns. A bull without horns is crossed with a horned cow. All eight offspring lack horns. The bull is most likely

Correct AnswerverifiedShow Answer

Which of the following would be considered a heterozygous dihybrid genotype?

Correct AnswerverifiedShow Answer

What genotypic ratio would result from a cross between two individuals who are both heterozygous for a trait?

Correct AnswerverifiedShow Answer

A cross is made between two parents with genotypes AaBB and aabb. If there are 32 offspring, how many of them would be expected to exhibit both dominant characteristics?

Correct AnswerverifiedShow Answer

Mendel carried out most of his research with

Correct AnswerverifiedShow Answer

In guinea pigs, B = black, b = brown, S = short hair, s = long hair. A guinea pig heterozygous for both traits is mated with a brown, short-haired guinea pig whose mother had long hair. What phenotypic ratio is expected in the offspring?

Correct AnswerverifiedShow Answer

Which of the following is true according to Mendel's law of segregation?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

A pheasant breeder starts with two birds in the P generation, one of which is AA and the other is aa. If he takes two of the birds from the F₁ generation and breeds them together, what genotypes can he expect in his F₂ offspring?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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