Question

for tongue rolling, an individual can have the alleles tt or tt. these sets of alleles are called select choice alleles. on the other hand, select choice alleles occur when an individual has the alleles tt.

Explanation:

The problem is about genetics related to tongue rolling alleles. In biology (a subfield of Natural Science), homozygous alleles are when an individual has the same alleles (like TT or tt), and heterozygous alleles are when an individual has different alleles (like Tt). So the first "Select Choice" should be "homozygous" and the second should be "heterozygous" (assuming the second part is about heterozygous as it mentions Tt).

Answer:

First Select Choice: homozygous
Second Select Choice: heterozygous