Possible genotypes for tongue rolling. Since he can roll his tongue, he must have at least one dominant allele. TT stands for homozygous dominant, while Tt stands for heterozygous, and TT stands for homozygous recessive. Each parent can contribute two types of gametes. Individuals with the RR or Rr genotype can roll their tongues, while those with the rr genotype cannot. RR and Rr express the ability to roll the tongue, while rr results in the inability to roll the tongue. c Keeping in mind that each individual has two alleles for the trait 9 In a population of 500 people, 160 are homozygous dominant for tongue rolling and 90 cannot roll their tongue. 1 continued Name 9 In a population of 500 people, 160 are homozygous dominant for tongue rolling and 90 cannot roll their tongue. Rolling is considered dominant over non-rolling. The allele for tongue-rolling is dominant to the allele for non-tongue-rolling. Dec 20, 2023 ยท Discover the genetic factors behind the ability to roll one's tongue and explore the fascinating world of inherited traits. 13zjhk amna ijn5jyh yezw3 yq ip4uy yfkd ket va3e bey4