In a cross AABBCC and aabbcc (P generation),what would be the phenotypic frequency of A_bbC_ in the F2 (produced by an F1 self cross),where ___= dominant or recessive allele?
A) 9/16
B) 9/64
C) 3/16
D) 3/64
E) 1/64

Question

Quizplus · Accepted Answer

The F1 generation from the cross AABBCC x aabbcc will all be AaBbCc, as they will inherit one allele from each parent. When these F1 individuals self-cross, the phenotypic ratio for each trait (A, B, C) in the F2 generation follows a Mendelian 9:3:3:1 ratio, where 9 represents the dominant phenotype, 3+3 represents the mixed phenotype, and 1 represents the recessive phenotype. For the phenotype A_bbC_, we need A (which can be AA or Aa, 3/4 chance), bb (1/4 chance), and C (which can be CC or Cc, 3/4 chance). Multiplying these probabilities gives 3/4 * 1/4 * 3/4 = 9/64.

In a Cross AABBCC and Aabbcc (P Generation),what Would Be