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Genetics Test Review 3
Test Description: Genetics Review
Instructions: Answer all questions to get your test result.
1) 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
75%
B
50%
C
0%
D
25%
2) If both parents are heterozygous having dimples, what is the probability their offspring will have dimples?
A
75%
B
50%
C
100%
D
25%
3) If both parents are heterozygous having long eyelashes, what is the probability their offspring will have short eyelashes?
A
75%
B
25%
C
100%
D
50%
4) 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
100%
B
25%
C
0%
D
50%
5) 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
50%
B
75%
C
25%
D
100%
6) 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.
7) If the chart shows a genetic disorder, child #3 probably has a homozygous recessive phenotype.
A
If the chart shows a genetic disorder, child #3 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 #1 probably has a homozygous recessive phenotype.
D
If the chart shows a genetic disorder, child #4 probably has a homozygous recessive phenotype.
8) 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, the mother and father are divorced.
C
In the chart shown, child #4 is a girl.
D
In the chart shown, child #2 is a girl.
9) The genetic disorder shown is recessive.
A
The father is most likely homozygous recessive for the trait causing a disorder.
B
The genetic disorder shown is recessive.
C
The father listed is most likely heterozygous for the trait causing a disorder.
D
The mother is homozygous recessive.
10) A punnett square is a graphic way of determining possible genotypes of offspring for a set of parents.
A
X
B
False
C
X
D
True
*select an answer for all questions
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