If a Red (RR) and White flower (WW) were crossbred, resulting in 100% RW, what phenotype(s) would be seen according to the rules of codominance?

Answer 1

Hello McKinley, I'd be happy to help you with your question!

In codominance, both traits are completely expressed.

Doing a punnett square for a crossbreed of RR for Red flowers and WW for White:

W | W

| |

R | RW | RW

| |

| |

R | RW | RW

| |

This leaves 100% RW as the genotype. Since both traits are completely expressed in the phenotype, a combination of Red and White flowers would result in pink flowers in 100% of the offspring.