Question

What is the phenotypic ratio of a dihybrid cross?

Answer 1

Dihybrid cross:

1. A dihybrid cross refers to a cross between two folks who have observed and expected traits that are monitored by two different genes.
2. A cross between two heterozygotes has a phenotypic ratio of $9:3:3:1$.
3. $\frac{9}{16}$ of the persons have the dominant phenotype for both characteristics, $\frac{3}{16}$ have the dominant phenotype with one characteristic, $\frac{3}{16}$ have the dominant phenotype for the other characteristic, and $\frac{1}{16}$ are recessive for both characteristics.