Question

Ear lobes can be attached to the face or non attached.Attached ear lobes is a recessive trait.A female with attached ear lobes has a child with a man with non attached ear lobes.He is heterozygous for this trait.List the genotypes of the parents​

Answer 1

rr, Rr, Rr, rr

There's a fifty percent chance the child will have attached earlobes.