In a praticular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull that is heterozygous for coat color, what percentage of their offspring would you expect to be black?

A. 25%
B. 50%
C. 75%
D. 100%
Is the answer B?
Thanks

I think it is C because black is dominant over red.

To determine the percentage of offspring that would be black, we need to apply the principles of Mendelian genetics. In this scenario, the black coat color is dominant, and the red coat color is recessive.

The cow with a red coat is homozygous recessive for coat color (rr). The black bull is heterozygous (Rr), meaning it carries one dominant black allele (R) and one recessive red allele (r).

When these two parents mate, their possible gene combinations for coat color in the offspring are as follows:

Cows gametes: r
Bull gametes: R or r

The Punnett square is a helpful tool to visualize the possible combinations of alleles in the offspring.

r r
R Rr Rr
r rr rr

From the Punnett square, we can see that 50% of the offspring will be black (Rr), and 50% will be red (rr).

Therefore, the correct answer is B. 50%, as you mentioned.

Don’t trust that, I haven’t taken the quiz yet, another website said D