Question

if a red cow (homozygous dominant) is crossed with a white cow (homozygous dominant), what alleles will the offspring have?
rw
rw
rw
rw

Explanation:

Step1: Determine the alleles of parents

Let's assume the allele for red color is \(R\) (homozygous dominant \(RR\)) and for white color is \(W\) (homozygous dominant \(WW\)).

Step2: Use Punnett square principle (simplified cross)

When \(RR\times WW\), each parent can only contribute one type of allele. The red - cow (\(RR\)) can only give \(R\) allele and the white - cow (\(WW\)) can only give \(W\) allele.

Answer:

B. \(RW\)