In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. what is the Father's genotype, mother's genotype?

2 answers

Father is rr
Mother is Rr
Genotype consists of two alphabets actually.
Non roller means both is rr and heterozygous means different alleles (alphabets).
both father and mother are rr