Why do different individuals of the same species have different traits?
A.
Individuals have differences in their genes that result in protein variations.
B.
Individuals have different proteins that cause variations among their genes.
C.
Individuals have proteins that produce genes with completely different functions from other individuals.

Question

Why do different individuals of the same species have different traits?
 A. 
Individuals have differences in their genes that result in protein variations.
 B. 
Individuals have different proteins that cause variations among their genes.
 C. 
Individuals have proteins that produce genes with completely different functions from other individuals.

Iridescent · Answer

I think that it might be A because it's possible to have a difference in genes. I think it's called genetic variation or something like that.