Question

Which of the following genotypes is homozygous dominant?

tt
Ff
XY
SS

Answer 1

It is indeed SS.

Step-by-step explanation:

The reason for this being that each genotype, normally, has its matching pair, in some form or another, So the reason why it wouldn't be tt, is because this would mean that both alleles are recessive. It wouldn't be Ff, because one allele is dominant, and the other is recessive. Last, it wouldn't be XY because although XY is dominant, it's heterozygous.

You're welcome.

Problem solved

Answer 2

Your answer would be SS uppercase means dominant and lowercase means recessive. This is full dominant because of the two uppercase letters of SS. I hope this helped!