25 Jun If we are considering two genes that assort independently we would predic
Question
Complementation tests are used to determine whether:
(select the one correct answer)
A.
a new mutant phenotype of interest is dominant or recessive to another mutant phenotype.
B.
two phenotypically identical mutants carry mutations in the same or in different genes.
C.
two or more mutants have the same sequence variation (the same DNA sequence)
D.
b and c
E.
a, b, and c
F.
a and c
If we are considering two genes that assort independently we would predict a 9:3:3:1 ratio with four different phenotypes in the F2 progeny created from crossing dihybrid F1s. If the a/a; B/_ progeny have the same phenotype as the a/a;b/b progeny what would the F2 phenotypic ratio be?
(choose one correct answer.) please explain!
a.
12:3:1
b.
10:6
c.
no change in the 9:3:3:1 ratio
d.
13:3
e.
9:7
f.
9:3:4
What are some reasons why individuals with a dominant allele may not display the phenotype (or may display a weaker than expected phenotype, for example)?
(there may be more than one correct answer)
Other genes may affect expression or function of the gene causing the condition (e.g. “rescue” the mutant phenotype)
Differences in the interference/regulation of transcription and translation
Differences in the type/location of mutations within a gene
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