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?
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
To determine the genotypes of the parents, we need to understand the inheritance pattern of the tongue rolling trait. The information you provided states that being a tongue roller (R) is dominant over non-roller (r).
Based on the information, we know that the woman is heterozygous for tongue rolling. This means she has one dominant allele (R) and one recessive allele (r). Let's represent her genotype as Rr.
Since the man is a non-roller, he must have two recessive alleles (r r). So, the father's genotype is rr.
To summarize:
- Father's genotype: rr
- Mother's genotype: Rr
To determine the father's and mother's genotypes, we need to apply the principles of Mendelian inheritance. In this case, tongue rolling is determined by a single gene with two possible alleles: R (dominant) for tongue roller and r (recessive) for non-roller.
Given the information that being a tongue roller is dominant over non-roller, we can deduce the following:
1. The man is a non-roller, which means his genotype must be rr since he lacks the dominant R allele.
2. The woman is heterozygous for tongue rolling, which means she has one dominant R allele and one recessive r allele. We can represent this genotype as Rr.
Therefore, the father's genotype is rr (non-roller) and the mother's genotype is Rr (heterozygous roller).