Biology 251 - Genetics » Spring 2021 » Topic 5.2 Quiz
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Question #1
When two genes control a single characteristic like fruit color, a dihybrid cross with parents that are homozygous recessive or homozygous dominant will generate progeny in the F2 generation that have a _____________ phenotypic ratio.
A.
9:3:3:1
B.
1:02:01
C.
3:01
D.
1:01
Question #2
When two genes control a single characteristic, a dihybrid cross with parents that are homozygous recessive or homozygous dominant that generates progeny in the F2 generation that have a 9:4:3 phenotypic ratio are demonstrating __________.
A.
a simple gene interaction.
B.
incomplete dominance.
C.
codominance.
D.
dominant epistasis.
E.
recessive epistasis.
Question #3
When a mutant phenotype that occurs in two different individuals results from mutant alleles from two different genes, it is possible to produce wild-type offspring from a mating due to _____________.
A.
complementation
B.
dominance
C.
incomplete penetrance
D.
epistasis
E.
expressivity
Question #4
A genetoype that could demonstrate the phenomenon of recessive epistasis would be:
A.
Aa
B.
bb
C.
AaBb
D.
aa
E.
AAbb
F.
AABb
Question #5
A gene that masks the phenotype of another gene is a ___________ gene.
A.
recessive
B.
epigenetic
C.
dominant
D.
epistatic
E.
hypostatic
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