Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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A
trait controlled by four alleles is said to have _____. a. | homologous
alleles | c. | autosomes | b. | hybridization | d. | multiple alleles | | | | |
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2.
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For
the trait being followed in the pedigree, individuals II-1 and II-4 in Figure 14-1 can be classified
as _____. a. | homozygous
dominant | c. | mutants | b. | carriers | d. | homozygous recessive | | | | |
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3.
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Refer
to Figure 14-1. If individual III-2 marries a person with the same genotype as individual I-1, what
is the chance that one of their children will be afflicted with hemophilia?
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4.
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What
type of inheritance pattern does the trait represented by the shaded symbols in Figure 14-1
illustrate? a. | multiple
alleles | c. | codominance | b. | incomplete dominance | d. | sex-linked | | | | |
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5.
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If a
female fruit fly heterozygous for red eyes (XRXr) crossed with a white-eyed
male (XrY), what percent of their offspring would have white eyes?
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6.
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The
type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and only
pink-flowering plants are produced is _____. a. | inbreeding | c. | incomplete dominance | b. | polygenic
inheritance | d. | codominance | | | | |
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7.
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In
pea plants, inflated pods (R) are dominant to constricted pods (r). Which of the
following crosses is a testcross? a. | Rr x Rr | c. | RR x RR | b. | RR x
Rr | d. | RR x
rr | | | | |
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8.
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A
cross between a white rooster and a black hen results in 100% blue Andalusian offspring. When two of
these blue offspring are mated, the probable phenotypic ratio seen in their offspring would be
_____. a. | 100%
blue | c. | 25% black, 50%
blue, 25% white | b. | 75% black, 25% white | d. | 75% blue, 25% white | | | | |
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9.
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The
23rd pair of chromosomes that differ in males and females are called _____. a. | autosomes | c. | sex
chromosomes | b. | polygenes | d. | multiple alleles | | | | |
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10.
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Which
of the bar graphs shown below represents what the phenotypic frequencies might be for polygenic
inheritance?
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