Skin color in a certain species of fish is inherited via a single gene with four different alleles.

How many different types of gametes would be possible in this system?

A) 1

B) 2

C) 4

D) 8

E) 16

The answer is C) 4.

It is known that gametes are haploid cells. Haploid cells have only one allele in the loci. Each gamete will contain each of these four different alleles. That means that there will be four different types of gametes containing four different alleles.