Typical ratios resulting from epistatic interactions in dihybrid crosses would be________ .
A)9:3:3:1,1:2:1
B)1:2:2:4:1:2:1:2:1,1:2:1
C)9:3:4,9:7
D)1:1:1:1,1:4:6:4:1
E)3:1,1:1

Question

Typical ratios resulting from epistatic interactions in dihybrid crosses would be________  .
A)9:3:3:1,1:2:1
B)1:2:2:4:1:2:1:2:1,1:2:1
C)9:3:4,9:7
D)1:1:1:1,1:4:6:4:1
E)3:1,1:1

Quizplus · Accepted Answer

Epistatic interactions often result in modified ratios from the typical Mendelian ratios. The ratio 9:3:4 and 9:7 are typical ratios resulting from two types of epistasis called recessive epistasis and dominant epistasis, respectively. Option A is the typical Mendelian ratio for two independently assorting traits. Option B is the ratio obtained from a trihybrid cross involving three independently assorting traits. Option D and E are typical Mendelian ratios for monohybrid crosses.

Typical Ratios Resulting from Epistatic Interactions in Dihybrid Crosses Would