QUESTION 1
Jim is blood type A, his brother John is type O and his sisterJane 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 showincomplete 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 thedominant and recessive alleles.
D.
Homozygotes have the same phenotype as theheterozygotes.
QUESTION 3
Which principle of inheritance concluded that when games areformed in meiosis, the two alleles of each gene separate from oneanother, and each gamete receives only one allele?
A.
independent assortment
B.
heterozygosity
C.
segregation
D.
dominance
 Â
QUESTION 4
Which term best describes a condition in which alleles at onelocus 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 chromosomedefines:
A.
a trait
B.
an allele
C.
a chromosome
D.
a locus
E.
a gene
QUESTION 6
The physical expression (appearance or function) of anorganism'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 anincompletely dominant trait produced by the combination of thechestnut color allele and the cream color allele. If you wanted toproduce as many palominos as possible, which mating strategy belowwould 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 onmultiple 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 bothalleles 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 witha black lab whose genotype is BbEe. What fraction of the offspringwould be expected to be yellow labs?
A.
1/4
B.
none
C.
1/2
D.
3/16
E.
1/8
 Â
QUESTION 12
What type of allele is always expressed regardless of whetherthe 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 simpledominance and independent assortment. What proportion of theprogeny 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 typeof 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 chromosomedefines:
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 thephenotype in an additive fashion?
A.
codominance
B.
polygenic inheritance
C.
multiple alleles
D.
pleiotropy
E.
epistasis
