Question

In humans, attached earlobes (A) are dominant to free earlobes (a). Suppose a couple who are both heterozygous for this trait have a child. Tell me

a.the phenotype of the parents:
b.the genotype of the parents:
c.the likelihood (or chance) that their child will have free earlobes:

Answer 1

a. The phenotype of the parents is that they have free earlobes

b. The genotype of the parents are Aa

c. The chance that their child would have free earlobes is 50%

Step-by-step explanation:

Heterozygous (different) = Aa

Homozygous (the same) = AA or aa

Make a punnett square for c.

A a

A AA Aa

a Aa aa