Assume that a dihybrid F₂ratio,resulting from epistasis,was 9:3:4.If a double heterozygote was crossed with the fully recessive type,what phenotypic ratio is expected among the offspring? A)1:1:2 B)1:1:1 C)9:3:4 D)1:2:1 E)12: 3: 1

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Quizplus · Accepted Answer

The expected phenotypic ratio among the offspring from a cross between a double heterozygote and a fully recessive type, given an original 9:3:4 ratio due to epistasis, simplifies to 1:1:2. This is because the cross reduces the original ratio by a factor of 4 (since one parent is fully recessive), leading to a simplified version of the original ratio.

Assume That a Dihybrid F2 ratio,resulting from Epistasis,was 9:3:4

Assume That a Dihybrid F₂ratio,resulting from Epistasis,was 9:3:4