Question 1

In mice, short hair is dominant to long hair. If a short-haired individual is crossed with a long-haired individual and both long- and short-haired offspring result, one can conclude that

Accepted Answer

A)   the short-haired individual is homozygous.
B)   the short-haired individual is heterozygous.
C)   the long-haired individual is homozygous.
D)   the long-haired individual is heterozygous.
E)   This cannot be answered without more information.F) B) and C)
G) C) and E)

Question 2

A linkage group corresponds to

Accepted Answer

A)   a group of genes on different chromosomes.
B)   the linear order of centromeres on a chromosome.
C)   the length of a chromosome.
D)   a group of genes on the same chromosome.
E)   None of the aboveF) A) and E)
G) B) and E)

Question 3

Draw a pedigree for three generations in which the grandfather has red-green color blindness and his daughter is a carrier. This daughter has four sons. Predict how many of the sons will be color-blind.

Accepted Answer

To draw the pedigree, we can represent t...

Question 4

Classical albinism results from a recessive allele. Which of the following is the expected ratio for the progeny when a normally pigmented male with an albino father has children with an albino woman?

Accepted Answer

A)   3/4 normal; 1/4 albino
B)   3/4 albino; 1/4 normal
C)   1/2 normal; 1/2 albino
D)   All normal
E)   All albinoF) B) and E)
G) A) and D)

Question 5

Recombination is most likely to occur between two loci that are _______.

Accepted Answer

The answer of Recombination is most likely to occur between...

Question 6

A(n) _______ trait is one that can be passed from one generation to another.

Accepted Answer

The answer of A(n) _______ trait is one that can...

Question 7

In the F2 generation of a dihybrid cross

Accepted Answer

A)   four phenotypes appear in the ratio 9:3:3:1 if the loci are linked.
B)   four phenotypes appear in the ratio 9:3:3:1 if the loci are unlinked.
C)   two phenotypes appear in the ratio 3:1 if the loci are unlinked.
D)   three phenotypes appear in the ratio 1:2:1 if the loci are unlinked.
E)   two phenotypes appear in the ratio 1:1 whether or not the loci are linked.F) B) and D)
G) None of the above

Question 8

When a given trait is the result of multigene action, one of the genes may mask the expression of one or all other genes. This phenomenon is termed

Accepted Answer

A)   epistasis.
B)   epigenesis.
C)   dominance.
D)   incomplete dominance.
E)   None of the aboveF) None of the above
G) A) and C)

Question 9

What is the probability that a cross between a true-breeding pea plant with spherical seeds and a true-breeding pea plant with wrinkled seeds will produce F1 progeny with spherical seeds?

Accepted Answer

A)   1/2
B)   1/4
C)   0
D)   1/8
E)   1F) A) and E)
G) A) and D)

Question 10

Incomplete dominance

Accepted Answer

A)   results in a phenotypic ratio of 1:2:1 in a monohybrid cross.
B)   is far less common than complete dominance.
C)   is the same as codominance.
D)   involves the distinct expression of both alleles, as in the ABO blood group system.
E)   occurs only in X-linked genes.F) C) and D)
G) B) and D)

Question 11

Genes located on mitochondrial DNA are usually inherited in what fashion?

Accepted Answer

A)   Randomly
B)   From the mother
C)   From the father
D)   Evenly from both the mother and the father
E)   By independent assortmentF) C) and D)
G) A) and D)

Question 12

If Mendel had performed experiments on cattle rather than on peas, the patterns of inheritance would not have been easily detectable, because cattle

Accepted Answer

A)   reproduce asexually.
B)   have small numbers of offspring.
C)   do not have observable phenotypes.
D)   do not have genotypes.
E)   do not have autosomes.F) B) and D)
G) B) and E)

Question 13

When many genes contribute to the phenotype, variation is said to be continuous, or _______.

Accepted Answer

The answer of When many genes contribute to the phenotype,...

Question 14

In the garden peas used in Mendel's experiments, the spherical seed character (SS)  is completely dominant over the wrinkled seed character (ss) . If the characters for height were incompletely dominant, such that TT was tall, Tt was intermediate, and tt was short, what would have resulted from crossing a spherical-seeded, short (SStt)  plant to a wrinkled-seeded, tall (ssTT)  plant?

Accepted Answer

A)   One-half would be smooth-seeded and intermediate height; one-half would be smooth-seeded and tall.
B)   All the progeny would be smooth-seeded and tall.
C)   All the progeny would be smooth-seeded and short.
D)   All the progeny would be smooth-seeded and intermediate in height.
E)   This cannot be answered without more information.F) None of the above
G) B) and D)

Question 15

A human male carrying an allele for a trait on the X chromosome is

Accepted Answer

A)   heterozygous.
B)   homozygous.
C)   hemizygous.
D)   monozygous.
E)   holozygous.F) A) and D)
G) A) and B)

Question 16

In guppies, fan tail is dominant to flesh tail, and rainbow color is dominant to pink. F1 female guppies are crossed with flesh-tailed, pink-colored males, and the following progeny are observed: 401 fan-tailed, pink-colored; 399 flesh-tailed, rainbow-colored; 98 flesh-tailed, pink-colored; and 102 fan-tailed, rainbow-colored guppies. Assuming that the F1 female guppies have both dominant alleles on one chromosome, the map distance between these two genes is

Accepted Answer

A)   80 cM.
B)   25 cM.
C)   0.8 cM.
D)   20 cM.
E)   None of the aboveF) B) and D)
G) B) and C)

Question 17

A dihybrid cross

Accepted Answer

A)   results in a genotypic ratio of 2:1.
B)   involves genes located on the sex chromosomes.
C)   results in offspring of lower quality than that of the parents.
D)   results in two different phenotypes in the F2 generation.
E)   is a cross between identical double heterozygotes.F) All of the above
G) B) and C)

Question 18

Quantitative variation is the result of the interaction of _______ and _______.

Accepted Answer

The answer of Quantitative variation is the result of the...

Question 19

What fraction of the offspring of the cross AaBb  ×	imes×  AaBb would show the dominant phenotypes for both genes?

Accepted Answer

A)   9/16
B)   3/16
C)   6/16
D)   12/16
E)   1/3 F) D) and E)
G) A) and E)

Question 20

The genetic disease blue sclera is determined by an autosomal dominant allele. The eyes of individuals with this allele have bluish sclera. These same individuals may also suffer from fragile bones and deafness. This is an example of

Accepted Answer

A)   incomplete dominance.
B)   pleiotropy.
C)   epistasis.
D)   codominance.
E)   linkage.F) C) and D)
G) A) and E)

Exam 12: Inheritance, Genes, and Chromosomes

The genetic disease blue sclera is determined by an autosomal dominant allele. The eyes of individuals with this allele have bluish sclera. These same individuals may also suffer from fragile bones and deafness. This is an example of

Correct Answer
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A human male carrying an allele for a trait on the X chromosome is

Correct Answer
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In mice, short hair is dominant to long hair. If a short-haired individual is crossed with a long-haired individual and both long- and short-haired offspring result, one can conclude that

Correct Answer
verified

When many genes contribute to the phenotype, variation is said to be continuous, or _______.

Correct Answer
verified

If Mendel had performed experiments on cattle rather than on peas, the patterns of inheritance would not have been easily detectable, because cattle

Correct Answer
verified

Recombination is most likely to occur between two loci that are _______.

Correct Answer
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Incomplete dominance

Correct Answer
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Genes located on mitochondrial DNA are usually inherited in what fashion?

Correct Answer
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What fraction of the offspring of the cross AaBb $\times$ AaBb would show the dominant phenotypes for both genes?

Correct Answer
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A dihybrid cross

Correct Answer
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A linkage group corresponds to

Correct Answer
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Draw a pedigree for three generations in which the grandfather has red-green color blindness and his daughter is a carrier. This daughter has four sons. Predict how many of the sons will be color-blind.

Correct Answer
Answered by ExamLex AI
To draw the pedigree, we can represent t...
View Answer

Quantitative variation is the result of the interaction of _ and _.

Correct Answer
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When a given trait is the result of multigene action, one of the genes may mask the expression of one or all other genes. This phenomenon is termed

Correct Answer
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Correct Answer
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In the F₂ generation of a dihybrid cross

Correct Answer
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What is the probability that a cross between a true-breeding pea plant with spherical seeds and a true-breeding pea plant with wrinkled seeds will produce F₁ progeny with spherical seeds?

Correct Answer
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A(n) _______ trait is one that can be passed from one generation to another.

Correct Answer
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Classical albinism results from a recessive allele. Which of the following is the expected ratio for the progeny when a normally pigmented male with an albino father has children with an albino woman?

Correct Answer
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Correct Answer
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Exam 12: Inheritance, Genes, and Chromosomes

The genetic disease blue sclera is determined by an autosomal dominant allele. The eyes of individuals with this allele have bluish sclera. These same individuals may also suffer from fragile bones and deafness. This is an example of

Correct AnswerverifiedShow Answer

A human male carrying an allele for a trait on the X chromosome is

Correct AnswerverifiedShow Answer

In mice, short hair is dominant to long hair. If a short-haired individual is crossed with a long-haired individual and both long- and short-haired offspring result, one can conclude that

Correct AnswerverifiedShow Answer

When many genes contribute to the phenotype, variation is said to be continuous, or _______.

Correct AnswerverifiedShow Answer

If Mendel had performed experiments on cattle rather than on peas, the patterns of inheritance would not have been easily detectable, because cattle

Correct AnswerverifiedShow Answer

Recombination is most likely to occur between two loci that are _______.

Correct AnswerverifiedShow Answer

Incomplete dominance

Correct AnswerverifiedShow Answer

Genes located on mitochondrial DNA are usually inherited in what fashion?

Correct AnswerverifiedShow Answer

What fraction of the offspring of the cross AaBb ×\times× AaBb would show the dominant phenotypes for both genes?

Correct AnswerverifiedShow Answer

A dihybrid cross

Correct AnswerverifiedShow Answer

A linkage group corresponds to

Correct AnswerverifiedShow Answer

Draw a pedigree for three generations in which the grandfather has red-green color blindness and his daughter is a carrier. This daughter has four sons. Predict how many of the sons will be color-blind.

Correct AnswerAnswered by ExamLex AITo draw the pedigree, we can represent t...View AnswerShow Answer

Quantitative variation is the result of the interaction of _______ and _______.

Correct AnswerverifiedShow Answer

When a given trait is the result of multigene action, one of the genes may mask the expression of one or all other genes. This phenomenon is termed

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the F2 generation of a dihybrid cross

Correct AnswerverifiedShow Answer

What is the probability that a cross between a true-breeding pea plant with spherical seeds and a true-breeding pea plant with wrinkled seeds will produce F1 progeny with spherical seeds?

Correct AnswerverifiedShow Answer

A(n) _______ trait is one that can be passed from one generation to another.

Correct AnswerverifiedShow Answer

Classical albinism results from a recessive allele. Which of the following is the expected ratio for the progeny when a normally pigmented male with an albino father has children with an albino woman?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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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Correct Answer
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Correct Answer
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Correct Answer
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What fraction of the offspring of the cross AaBb $\times$ AaBb would show the dominant phenotypes for both genes?

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
Answered by ExamLex AI
To draw the pedigree, we can represent t...
View Answer

Quantitative variation is the result of the interaction of _ and _.

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Correct Answer
verified

Correct Answer
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In the F₂ generation of a dihybrid cross

Correct Answer
verified

What is the probability that a cross between a true-breeding pea plant with spherical seeds and a true-breeding pea plant with wrinkled seeds will produce F₁ progeny with spherical seeds?

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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