In a group of students, 69% can roll their tongues, a trait determined by a dominant gene. The other 31% of the students were non-tongue rollers. Calculate the frequency of the R and r alleles for tongue rolling in this group of students.

Explanation:

Genetic variation refers to diversity in gene frequencies. Genetic variation can refer to differences between individuals or to differences between populations. Mutation is the ultimate source of genetic variation, but mechanisms such as sexual reproduction and genetic drift contribute to it as well.