Answer:
B. 50%
Explanation:
Heterozygous means that the offspring have two different alleles. Homozygous means there are are two of the same alleles.
In this Punnet Square, the offspring outcomes are:
BB, Bb, Bb and bb
BB and bb are homozygous: they have 2 of the same allele.
2 of the 4 are Bb.
Bb has two different alleles, one is the dominant allele of B( brown eyes) and the other is the recessive allele of b (blue eyes).
Therefore, there are 2 heterozygous outcomes out of the 4 outcomes. 2 out of 4 is equivalent to 1/2 or 50%. Thus, the correct answer is B. 50%
