In the following image, the gene H codes for black hair, and h codes for red hair. This follows the Mendelian inheritance pattern - the trait is only determined by one gene. Looking at the following Punnett square, what is the probability that the offspring will have red hair? Explain why in 2-3 complete sentences.

Question

(3 points)

Answer 1

In a Punnett square involving the gene for hair color where H represents the dominant allele for black hair and h represents the recessive allele for red hair, the probability of an offspring having red hair (hh) can be determined by analyzing the genotypes of the parents. If both parents are heterozygous (Hh), the Punnett square shows that there is a 1 in 4 chance (25%) for the offspring to inherit the hh genotype, resulting in red hair. This occurs because red hair is only expressed when an individual has two recessive alleles (hh).