Which one of the followoing genotypes is homozygous dominant and which one homozygous recessive in regard to tongue rolling: Rr, rr, RR.

Which one of the followoing genotypes is homozygous dominant and which

1.	Which one of the followoing genotypes is homozygous dominant and which one homozygous recessive in regard to tongue rolling: Rr, rr, RR.
Answer» Which one of the followoing genotypes is homozygous dominant and which one homozygous recessive in regard to tongue rolling: Rr, rr, RR.