When cattle with solid white coats (W) are mated to cattle with solid red coats (R), the offspring are roan (WR), meaning they have coats containing both white and red hairs. The roan coat is an example of codominance.

Question

When cattle with solid white coats (W) are mated to cattle with solid red coats (R), the offspring are roan (WR), meaning they have coats containing both white and red hairs. The roan coat is an example of codominance.

A farmer mates two roan cattle.
What is the chance that their offspring will be white?
101 Roan Cattle Stock Photos, Pictures & Royalty-Free Images - iStockMoo

a
100%
b
75%
c
50%
d
25%
e
0%

Answer 1

The correct answer is d) 25%.

When two roan cattle mate, the possible genotypes for their offspring are 25% white (WW), 50% roan (WR), and 25% red (RR). Therefore, there is a 25% chance that their offspring will be white.