Question

In cattle, having horns is a recessive trait (h) to not having horns (H). When cattle with horns are crossed with cattle that do not have horns, the number of offspring having horns was equal to those not having horns.

Which of the following is MOST LIKELY to be true?

(a) Both parents are homozygous dominant.

(b) One parent is homozygous dominant.

(c) Both parents are heterozygous.

(d) One parent is heterozygous.

Answer 1

In this scenario, the trait for having horns (h) is described as recessive, and the trait for not having horns (H) is presumably dominant. When cattle with horns (hh) are crossed with cattle that do not have horns (HH), the number of offspring having horns was equal to those not having horns.

This outcome suggests that both parents are heterozygous (Hh) for the trait.

So, the MOST LIKELY statement is:

(c) Both parents are heterozygous.