Question

Color coat for roan cows (RW) shows codominance. A cow with a white coat has WW as its genotype. A cow with a red coat has RR as its genotype. A roan cow (RW) is crossed with another roan cow (RW), what fraction of the offspring will be white (WW)? A 0/4 B 1/4 C 1/2 D 3/4

Answer 1

Answer:

The correct option is B) 1/4

Explanation:

Co-dominance can be described as a phenomenon which arises when the dominant trait is not fully dominant over the recessive trait. As a result, both the dominant and the recessive trait are shown in the organism.

To depict the results between two roan cows, lets make a punnet square:

       R        W

R   RR       RW

W   RW     WW

The results form the punnet square show that there is a 25% or 1/4 chance for the offspring produced to be a white cow.