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S1 Review: Genetics
Test Description: S1 Review: Genetics
Instructions: Answer all questions to get your test result.
1) The passing of traits from parents to offspring is called
A
development.
B
maturation.
C
genetics.
D
heredity.
2) Basic unit of heredity.
A
DNA
B
gene
C
allele
D
chromosome
3) If a red and a white carnation flowers were crossbred, the resulting flowers would be
A
white, because that color would be dominant.
B
red, because that color would be dominant.
C
pink, because carnations are codominant.
D
pink, because carnations are incomplete dominant.
4) What would be the blood type of a person who inherited an A allele from one parent and an O allele from the other?
A
Type O, because A is recessive and O is dominant.
B
Type AB, because A and B are dominant.
C
Type A, because A is dominant and O is recessive.
D
Type AO, because A and O are codominant.
5) If widow's peak (W) is dominant over no widow's peak (w). What's the probability that offspring of a hetero parent & a homo recessive parent will be homo recessive?
A
50%
B
25%
C
75%
D
0%
6) If dimples (D) is dominant over no dimples(d) and two parents are heterozygous for this trait, what is the probability that the offspring will have dimples?
A
25%
B
100%
C
50%
D
75%
7) If a child has a disorder that neither of the parents have, then
A
the disorder could be x-linked and received from a carrier father.
B
the disorder is autosomal dominant and one of the parents is a carrier.
C
the disorder is autosomal recessive and both parents are heterozygous.
D
the disorder is autosomal recessive and one of the must be homozygous recessive.
8) A son does not have a sex-linked disorder, yet his mother was a carrier and his father and the disease. How is this possible?
A
A carrier mother is heterozygous and therefore contains both a recessive & dominant allele.
B
A son can't receive x-linked genes from a father so it is irrelevant that his father a disorder.
C
All of the above
D
A son could receive a recessive from mother & get the disorder since he only receives one allele.
9) Huntingtons is a dominant autosomal disease. If your mother was Hh, father was hh, spouse was hh and child was Hh, what is your genotype/phenotype?
A
Hh without the disorder.
B
Hh with the disorder.
C
hh without the disorder.
D
hh with the disorder.
10) If a characteristic is sex-linked, it
A
occurs only in females.
B
occurs most commonly in males.
C
is always fatal.
D
can never occur in females.
*select an answer for all questions
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