LIFE SCIENCE

Detailed explanation-1: -Curly hair is considered a “dominant” gene trait. Straight hair is considered “recessive.” To put that in simple terms, that means that if one parent gives you a curly-haired gene and the other parent gives you a straight-haired gene, you’ll be born with curly hair.

Detailed explanation-2: -Incomplete Dominance: Wavy hair is an intermediate phenotype between straight and curly hair. The presence of an intermediate phenotype means that it is an example of incomplete dominance.

Detailed explanation-3: -Thus, the genotype of both parents is Cc (heterozygous). The probability of the parents having a child with curly hair is 3/4, as shown in the Punnett square below: A Punnett square for the cross of two heterozygous parents is shown.

Detailed explanation-4: -Yes, in fact it’s rather likely. Curly hair is dominant to straight hair, meaning if the child inherits the curly allele from her father, she will certainly display the curly phenotype, even though she will definitely inherit the “straight” allele from mom.