Genetics Test Review 3: Question Preview (ID: 11469)


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A punnett square is a graphic way of determining possible genotypes of offspring for a set of parents.
a) True
b) False
c) X
d) X

The genetic disorder shown is recessive.
a) The father listed is most likely heterozygous for the trait causing a disorder.
b) The genetic disorder shown is recessive.
c) The mother is homozygous recessive.
d) The father is most likely homozygous recessive for the trait causing a disorder.

In the chart shown, child #4 is a girl.
a) In the chart shown, child #1 #2 are identical twins.
b) In the chart shown, child #4 is a girl.
c) In the chart shown, child #2 is a girl.
d) In the chart shown, the mother and father are divorced.

If a father is heterozygous for freckles and a mother is homozygous dominant for freckles, what is the probability of an offspring having freckles?
a) 25%
b) 50%
c) 75%
d) 100%

A diagram in which several generations of a family and the occurrence of certain genetic characteristics are shown is called a
a) punnett square.
b) monohybrid cross.
c) pedigree chart.
d) family karyotype.

If the chart shows a genetic disorder, child #3 probably has a homozygous recessive phenotype.
a) If the chart shows a genetic disorder, child #1 probably has a homozygous recessive phenotype.
b) If the chart shows a genetic disorder, child #2 probably has a homozygous recessive phenotype.
c) If the chart shows a genetic disorder, child #3 probably has a homozygous recessive phenotype.
d) If the chart shows a genetic disorder, child #4 probably has a homozygous recessive phenotype.

If a father is homozygous for freckles (F) and the mother has no freckles (f). What is the probability that an offspring will have no freckles?
a) 0%
b) 25%
c) 50%
d) 100%

If both parents are heterozygous having dimples, what is the probability their offspring will have dimples?
a) 25%
b) 50%
c) 75%
d) 100%

If both parents are heterozygous having long eyelashes, what is the probability their offspring will have short eyelashes?
a) 25%
b) 50%
c) 75%
d) 100%

If a father is heterozygous for widow\\\'s peak, which is dominant, a mother has no peak, what is the probability the offspring will be homozygous recessive?
a) 0%
b) 25%
c) 50%
d) 75%

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