Question

in goldfish, the twin-tailed trait has two alleles. goldfish that have a heterozygous genotype produce the single-tailed phenotype. this means that goldfish with the twin-tailed phenotype must be

Answer 1

Homozygous recessive

Step-by-step explanation:

This is because if single-tailed is heterozygous the alleles would be Tt which would mean the single-tailed trait is dominant and twin-tailed is recessive.

T = Single t = twin

So, for a recessive trait to show there would have to be two of them with would make it tt which is homozygous recessive since both of them are recessive.