Lec 7 Flashcards
(5 cards)
1
Q
A gain-of-function mutation __
A
results in an increased quantity of the normal gene product
most often result in dominant alleles
2
Q
Assume that a dihybrid cross is made in which the genes’ loci are autosomal, independently assorting, and incompletely dominant. How many different phenotypes are expected in the offspring?
A
9
3x3=9
3(3 phenotypes from gene 1) x 3(3 phenotypes from gene 2)
3
Q
epistasis
A
Interaction between genes where one gene’s alleles can modify/obscure another gene’s expression
4
Q
If the dihybrid F2 shows epistasis with a 9:3:4 ratio (recessive epistasis), then:
A
The recessive allele at one locus masks the expression of the other gene.
5
Q
A
