Question

In humans, the trait for tongue rolling is dominant over the trait for the inability of a human to roll his/her tongue. If a heterozygous male is crossed with a homozygous recessive female, then what percent of the offspring would be expected to have the ability to roll their tongues?

Answer 1

The ability to roll your tongue is a dominant trait produced by the dominant allele, which you inherited from at least one of your parents. If you cannot roll your tongue, it means that you have two copies of the recessive allele.

Answer 2

Answer:

Because tongue-rolling is recessive, the only way a person would be unable to roll his/her tongue would be if s/he were homozygous mutant. 2. The ability to roll one's tongue is a dominant trait.