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 C?
Thanks

br x rr

you get
br, br, rr, rr

So C?

2 B? So B?

To determine the expected percentage of black offspring, we need to understand the principles of inheritance involved in coat color in this particular breed of cattle.

Given that black coat color is dominant over red coat color, we can represent the genotypes as follows:
- Black coat is represented by the dominant allele (B)
- Red coat is represented by the recessive allele (b)

The cow with a red coat is homozygous for the recessive red allele (bb), while the black bull is heterozygous (Bb) since he carries one dominant black allele (B) and one recessive red allele (b).

When these two cattle are crossed, their possible offspring combinations will be as follows:
- Offspring 1: Bb (black)
- Offspring 2: bb (red)

Since only one allele for black coat color is needed for it to be expressed (dominant), 50% of the offspring will be black (Bb).

Therefore, the answer is B. 50%.

No. Count the offspring . How many have a b in them?