in humans, the ability to roll the tongue is due to a dominant allele. People who cannot roll their tongue are recessive for the trait. A group of 250 people participated in a survey, and it was determined that 210 of them could roll their tongue, and 40 of them could not.

c) what is the frequency of the dominant and recessive allele in this group?

d) What is the percent of the people should be homozygous tongue rollers?

e) what percent of the people should be heterozygous tongue rollers?