Question

given three possible phenotypes for parents showing dominance (AA, Aa, aa) which combination would produce a 2:1:1 ratio of genotypes and 3:1 ratio of phenotypes

Answer 1

A cross between two heterozygote individuals, Aa x Aa Explanation: A cross between two heterozygotes individuals would produce a 1:2:1 ratio of genotypes and a 3:1 ratio of phenotypes.This is a case of complete dominance of one of the alleles over the other one. In this case, the allele A completely dominates over the allele a.

Step-by-step explanation: