Being able to roll your tongue is dominant to not being able to roll your tongue. Smooth middle knuckles are dominant to hairy m
iddle knuckles. Predict the outcome between two people that are heterozygous for BOTH traits
2 answers:
Answer:
There would be 9 individuals with the ability to roll their tongues and have smooth middle knuckles, 3 individuals who can roll their tongues but have hairy middle knuckles, 3 individuals who cannot roll their tongues but have smooth middle knuckles, and 1 individual who cannot roll their tongues and has hairy middle knuckles.
Explanation:
Assuming that "R" indicates the allele for tongue rolling and "r" denotes the allele for the non-rolling phenotype, while "S" represents smooth middle knuckles and its recessive allele "s" indicates hairy middle knuckles.
If we consider the genotype of heterozygous parents as "RrSs", a cross between two "RrSs" genotypes would yield the following phenotype ratio:
9 tongue roller and smooth middle knuckles: 3 tongue roller and hairy middle knuckles: 3 Non-roller and smooth middle knuckle: 1 non-roller and hairy middle knuckle.
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