Promblems In Genetic Plz read additional info for the question?

Question

Bill can curl his tongue but his mother could not. If the ability to curl one's tongue is dominant, what must be Bill's genotype? Expalin.

NOTE: This is not homework, Im studying for a quiz and i stumbled across this promblem

Answer 1

If something is inherited dominantly then the individual would need to be Homozygous for the Dominant allele or heterozygous. Thus, if one does not inherit the trait they would have to be homozygous for the recessive allele.