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.
1:02:01
B.
1:01
C.
3:01
D.
9:3:3:1
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.
codominance.
B.
incomplete dominance.
C.
recessive epistasis.
D.
dominant epistasis.
E.
a simple gene interaction.
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.
expressivity
C.
incomplete penetrance
D.
dominance
E.
epistasis
Question #4
A genetoype that could demonstrate the phenomenon of recessive epistasis would be:
A.
bb
B.
AaBb
C.
aa
D.
AAbb
E.
Aa
F.
AABb
Question #5
A gene that masks the phenotype of another gene is a ___________ gene.
A.
recessive
B.
epistatic
C.
hypostatic
D.
dominant
E.
epigenetic
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