Answer the following question given this paragraph: 

Many human traits are controlled by more than one gene. These traits are called polygenic traits (or characteristics). The alleles of each gene have a minor additive effect on the phenotype. There are many possible combinations of alleles, especially if each gene has multiple alleles. Therefore, a whole continuum of phenotypes is possible.


Q: What human traits are controlled by more than one gene?

 Choices:

- mutant traits

- autolysis traits

- maladaptive traits

- polygenic traits

A:
polygenic traits
