Question 1

The location of a gene on a chromosome is called a(n) .

Accepted Answer

The answer of The location of a gene on a...

Question 2

The physical manifestation of an organism's genes is its

Accepted Answer

A)   genetic code.
B)   environment.
C)   number of chromosomes.
D)   phenotype.
E)   genotype.F) C) and D)
G) None of the above

Question 3

Based on this figure, what is the genotype of an individual pea plant that is homozygous for green pod and constricted pod and is 6 feet tall? (Assume that green and yellow pods are indicated by G and g, inflated and constricted pods by I and i, and height by T and t.)

Accepted Answer

A)   GGiiTT
B)   ggiitt
C)   GgIiTt
D)   GGIITT
E)   ggiiTTF) A) and C)
G) A) and E) A

Question 4

Crossing smooth- seeded pea plants with wrinkled- seeded pea plants resulted in progeny that all had smooth seeds. This indicates that the wrinkled- seed trait is

Accepted Answer

A)   recessive only.
B)   dominant only.
C)   codominant and recessive.
D)   codominant only.
E)   codominant and dominant.F) A) and E)
G) B) and D)

Question 5

When genes are linked, a few of the recombinant genotypes still occur in the offspring because of

Accepted Answer

A)   independent assortment.
B)   crossing over.
C)   linkage.
D)   natural selection.
E)   mutation.F) A) and B)
G) B) and E)

Question 6

Imagine that smurfs live in widely separated groups and rarely interbreed, so geneticists know very little about them. On one occasion, two smurfs from different groups did mate. A big- footed, white smurf mated with a small- footed, blue smurf. Three offspring resulted: one big- footed and blue and two small- footed and blue. Which statement about the inheritance of color in smurfs is most likely to be correct?

Accepted Answer

A)   White is dominant to blue.
B)   Blue is dominant to white.
C)   White and blue are codominant.D) A) and B)
E) All of the above

Question 7

A recessive allele on the X chromosome causes color deficiency. A noncolor- deficient woman (whose father is color deficient)  marries a color- deficient man. If they have a son, what is the chance that he will be color deficient?

Accepted Answer

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

Question 8

Gregor Mendel concluded that each pea has two units for each trait, and each gamete contains one unit. Mendel's "units" are now called

Accepted Answer

A)   transcription factors.
B)   genes.
C)   characters.
D)   chromosomes.E) None of the above
F) All of the above

Question 9

Two parents with normal vision have two sons, one color deficient and one with normal vision. If this couple then has six daughters, can you predict what percentage of the daughters will have normal color vision?

Accepted Answer

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

Question 10

If an individual who is homozygous for type B blood marries a heterozygous type A individual, what is the chance that their first child will have type AB blood?

Accepted Answer

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

Question 11

All of the following are true regarding pedigree analysis EXCEPT that it

Accepted Answer

A)   reveals whether a trait is dominant or recessive.
B)   documents the transmission of a genetic characteristic over two or more generations.
C)   can incorporate molecular biology techniques.
D)   is exclusively used to study the patterns of inheritance in dogs.E) B) and C)
F) B) and D)

Question 12

Only males can express sex- linked traits.

Accepted Answer

A) True 
 B)False  False

Question 13

Although the law of independent assortment is generally applicable, when two loci are located physically close to each other on the same chromosome, the phenotypes of the offspring sometimes do not fit the phenotypes predicted. This is due to

Accepted Answer

A)   chromatid abnormalities.
B)   translation.
C)   linkage.
D)   inversions.
E)   chromosome exchange.F) A) and B)
G) A) and E)

Question 14

A recessive allele on the X chromosome causes color deficiency. A color- deficient boy has a mother with normal vision and a color- deficient father. From which parent did he get the color- deficiency gene?

Accepted Answer

A)   Mother
B)   Father
C)   Either mother or fatherD) A) and B)
E) A) and C)

Question 15

Traits controlled by sex- linked recessive genes are expressed more often in males because

Accepted Answer

A)   all male offspring of a female carrier get the gene.
B)   the male has only one gene for the trait.
C)   males always carry two copies of these genes.
D)   males inherit these genes from their fathers more often than their mothers.
E)   males get more doses of the recessive gene than do females.F) B) and D)
G) D) and E)

Question 16

An individual who is a carrier for a sex- linked trait such as hemophilia

Accepted Answer

A)   is homozygous for the recessive condition.
B)   shows the dominant phenotype.
C)   is always female.
D)   cannot pass the gene on to his or her daughters.E) None of the above
F) A) and B)

Question 17

Yellow- seeded pea plants may be homozygous or heterozygous. To find out which, cross the plants with

Accepted Answer

A)   true- breeding green- seeded plants.
B)   heterozygous green- seeded plants.
C)   the same genotype.
D)   heterozygous yellow- seeded plants.
E)   true- breeding yellow- seeded plants.F) B) and E)
G) A) and C)

Question 18

The failure of chromosomes to segregate properly during meiosis is called

Accepted Answer

A)   translocation.
B)   nondisjunction.
C)   independent assortment.
D)   replication.
E)   inversion.F) C) and D)
G) A) and E)

Question 19

Sex- linked traits affect only sexual characteristics.

Accepted Answer

A) True 
 B)False

Question 20

What would be TRUE if linkage of two genes was complete?

Accepted Answer

A)   The genes would assort independently.
B)   Crossing over between the two genes would rarely occur.
C)   All possible combinations of alleles in the gametes would be produced.
D)   All possible combinations of alleles in the offspring would be produced.E) C) and D)
F) None of the above

Exam 11: Patterns of Inheritance

The location of a gene on a chromosome is called a(n) .

Correct Answer
verified

The physical manifestation of an organism's genes is its

Correct Answer
verified

Based on this figure, what is the genotype of an individual pea plant that is homozygous for green pod and constricted pod and is 6 feet tall? (Assume that green and yellow pods are indicated by G and g, inflated and constricted pods by I and i, and height by T and t.)

Correct Answer
verified
A

Crossing smooth- seeded pea plants with wrinkled- seeded pea plants resulted in progeny that all had smooth seeds. This indicates that the wrinkled- seed trait is

Correct Answer
verified

When genes are linked, a few of the recombinant genotypes still occur in the offspring because of

Correct Answer
verified

Correct Answer
verified

A recessive allele on the X chromosome causes color deficiency. A noncolor- deficient woman (whose father is color deficient) marries a color- deficient man. If they have a son, what is the chance that he will be color deficient?

Correct Answer
verified

Gregor Mendel concluded that each pea has two units for each trait, and each gamete contains one unit. Mendel's "units" are now called

Correct Answer
verified

Two parents with normal vision have two sons, one color deficient and one with normal vision. If this couple then has six daughters, can you predict what percentage of the daughters will have normal color vision?

Correct Answer
verified
B

If an individual who is homozygous for type B blood marries a heterozygous type A individual, what is the chance that their first child will have type AB blood?

Correct Answer
verified

All of the following are true regarding pedigree analysis EXCEPT that it

Correct Answer
verified

Only males can express sex- linked traits.

Correct Answer
verified
False

Although the law of independent assortment is generally applicable, when two loci are located physically close to each other on the same chromosome, the phenotypes of the offspring sometimes do not fit the phenotypes predicted. This is due to

Correct Answer
verified

A recessive allele on the X chromosome causes color deficiency. A color- deficient boy has a mother with normal vision and a color- deficient father. From which parent did he get the color- deficiency gene?

Correct Answer
verified

Traits controlled by sex- linked recessive genes are expressed more often in males because

Correct Answer
verified

An individual who is a carrier for a sex- linked trait such as hemophilia

Correct Answer
verified

Yellow- seeded pea plants may be homozygous or heterozygous. To find out which, cross the plants with

Correct Answer
verified

The failure of chromosomes to segregate properly during meiosis is called

Correct Answer
verified

Sex- linked traits affect only sexual characteristics.

Correct Answer
verified

What would be TRUE if linkage of two genes was complete?

Correct Answer
verified

Exam 11: Patterns of Inheritance

The location of a gene on a chromosome is called a(n) .

Correct AnswerverifiedShow Answer

The physical manifestation of an organism's genes is its

Correct AnswerverifiedShow Answer

Based on this figure, what is the genotype of an individual pea plant that is homozygous for green pod and constricted pod and is 6 feet tall? (Assume that green and yellow pods are indicated by G and g, inflated and constricted pods by I and i, and height by T and t.)

Correct AnswerverifiedA

Crossing smooth- seeded pea plants with wrinkled- seeded pea plants resulted in progeny that all had smooth seeds. This indicates that the wrinkled- seed trait is

Correct AnswerverifiedShow Answer

When genes are linked, a few of the recombinant genotypes still occur in the offspring because of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A recessive allele on the X chromosome causes color deficiency. A noncolor- deficient woman (whose father is color deficient) marries a color- deficient man. If they have a son, what is the chance that he will be color deficient?

Correct AnswerverifiedShow Answer

Gregor Mendel concluded that each pea has two units for each trait, and each gamete contains one unit. Mendel's "units" are now called

Correct AnswerverifiedShow Answer

Two parents with normal vision have two sons, one color deficient and one with normal vision. If this couple then has six daughters, can you predict what percentage of the daughters will have normal color vision?

Correct AnswerverifiedB

If an individual who is homozygous for type B blood marries a heterozygous type A individual, what is the chance that their first child will have type AB blood?

Correct AnswerverifiedShow Answer

All of the following are true regarding pedigree analysis EXCEPT that it

Correct AnswerverifiedShow Answer

Only males can express sex- linked traits.

Correct AnswerverifiedFalse

Although the law of independent assortment is generally applicable, when two loci are located physically close to each other on the same chromosome, the phenotypes of the offspring sometimes do not fit the phenotypes predicted. This is due to

Correct AnswerverifiedShow Answer

A recessive allele on the X chromosome causes color deficiency. A color- deficient boy has a mother with normal vision and a color- deficient father. From which parent did he get the color- deficiency gene?

Correct AnswerverifiedShow Answer

Traits controlled by sex- linked recessive genes are expressed more often in males because

Correct AnswerverifiedShow Answer

An individual who is a carrier for a sex- linked trait such as hemophilia

Correct AnswerverifiedShow Answer

Yellow- seeded pea plants may be homozygous or heterozygous. To find out which, cross the plants with

Correct AnswerverifiedShow Answer

The failure of chromosomes to segregate properly during meiosis is called

Correct AnswerverifiedShow Answer

Sex- linked traits affect only sexual characteristics.

Correct AnswerverifiedShow Answer

What would be TRUE if linkage of two genes was complete?

Correct AnswerverifiedShow Answer

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A

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B

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False

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