Question

QUESTION 1

Jim is blood type A, his brother John is type O and his sister Jane is type AB. What are the genotypes of their parents?

A.

IAi and IBi

B.

IAIA and IBIB

C.

IAi and IBIB

D.

IAIB and ii

E.

IAIA and IBi

QUESTION 2

Which of the following is true for alleles that show incomplete dominance?

A.

Heterozygotes have a genotype like the dominant allele.

B.

Homozygotes have a genotype like the recessive allele.

C.

Heterozygotes have a phenotype intermediate between the dominant and recessive alleles.

D.

Homozygotes have the same phenotype as the heterozygotes.

QUESTION 3

Which principle of inheritance concluded that when games are formed in meiosis, the two alleles of each gene separate from one another, and each gamete receives only one allele?

A.

independent assortment

B.

heterozygosity

C.

segregation

D.

dominance

QUESTION 4

Which term best describes a condition in which alleles at one locus can alter the expression of alleles at another locus?

A.

polygenic inheritance

B.

codominance

C.

multiple alleles

D.

pleiotropy

E.

epistasis

QUESTION 5

A single unit of genetic information located on a chromosome defines:

A.

a trait

B.

an allele

C.

a chromosome

D.

a locus

E.

a gene

QUESTION 6

The physical expression (appearance or function) of an organism's genes defines:

A.

genotype

B.

a single characteristic

C.

physiology

D.

mutation

E.

phenotype

QUESTION 7

Palomino horses (golden color with a blond mane) are an incompletely dominant trait produced by the combination of the chestnut color allele and the cream color allele. If you wanted to produce as many palominos as possible, which mating strategy below would be the best choice?

A.

Chestnut x Cream

B.

Palomino x Cream

C.

Palomino x Chestnut

D.

Palomino x Palomino

QUESTION 8

Which term best describes the effect of a single gene on multiple aspects of the phenotype?

A.

epistasis

B.

pleiotropy

C.

multiple alleles

D.

codominance

E.

polygenic inheritance

QUESTION 9

Which term best describes the separate expression of both alleles for a single trait in the same cell?

A.

multiple alleles

B.

codominance

C.

pleiotropy

D.

epistasis

E.

polygenic inheritance

QUESTION 10

One form of a gene found on a single chromosome defines:

A.

an allele

B.

a locus

C.

a chromosome

D.

a trait

E.

a gene

QUESTION 11

A chocolate lab (whose mother was a yellow lab) is mated with a black lab whose genotype is BbEe. What fraction of the offspring would be expected to be yellow labs?

A.

1/4

B.

none

C.

1/2

D.

3/16

E.

1/8

QUESTION 12

What type of allele is always expressed regardless of whether the individual is homozygous or heterozygous for it?

A.

Both the dominant and recessive alleles

B.

Recessive allele

C.

Allosteric allele

D.

Lethal allele

E.

Dominant allele

QUESTION 13

Given the parents AABBGgHhrr × AabbGgHhRr, assume simple dominance and independent assortment. What proportion of the progeny will be expected to have the genotype AaBbggHHrr?

A.

1/256

B.

1/64

C.

1/16

D.

1/32

E.

1/128

QUESTION 14

___________________ is defined as having two of the same type of allele for a particular trait.

A.

Homozygous

B.

Dominance

C.

Incomplete dominance

D.

Heterozygous

E.

Genotype

QUESTION 15

The physical position of an allele on a single chromosome defines:

A.

an allele

B.

a chromosome

C.

a gene

D.

a locus

E.

a trait

QUESTION 16

Which term best describes two or more genes affecting the phenotype in an additive fashion?

A.

codominance

B.

polygenic inheritance

C.

multiple alleles

D.

pleiotropy

E.

epistasis