Question

In the phenotypic ratio 9:3:3:1, 1 stands for

Heterozygous recessive

Homozygous dominant

Heterozygous dominant

Homozygous recessive​

Answer 1

A 9:3:3:1 Ratio is at ratio of phenotypes among offspring (progeny) that results when two dihybrids mate, e.g., AaBa × AaBa, where allele A is dominant to allele a, allele B is dominant to allele b, and the A and B loci otherwise have no impact on each other phenotypically (no epistasis) nor genotypically (no linkage).