Concerning comb shape in chickens, which of the following is true? multiple choice
the r gene is dominant to the p gene.
the r and p must both be present to produce a walnut comb.
r is recessive to r and produces a rose comb.
p is recessive to p and produces a single comb.

The R and P must both be present to produce a walnut comb.

Explanation:

Comb shape in chickens is an example of intergenic interaction. Two genes R and P come together to determine the type of comb.

Hence, it is clear that both R and P must be present to produce a walnut comb.

explanation: grsaa

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?