Question

Which of these genotypes are heterozygous?

A: TT
B: Tt
C: tt
D: none of these

Answer 1

B: Tt

Step-by-step explanation:

Heterozygous mean two different alleles. B is the answer because it has two different alleles, Tt.

I hope this helped you.

Answer 2

B

Step-by-step explanation:

Heterozygous genotypes are those that have one dominant allele and one recessive allele.

Dominant alleles are represented as capital letters, while recessive alleles are represented as lowercase letters. So, a heterozygote should have one capital letter and one lowercase letter.

Looking at the answer choices, only B fits this, so it's the answer.

Hope this helps!