Question

1. what is the difference between a single - gene trait and a polygenic trait?

Explanation:

A single - gene trait is controlled by one gene, showing distinct phenotypic classes following Mendelian inheritance patterns. A polygenic trait is controlled by multiple genes, resulting in a continuous range of phenotypes often influenced by environmental factors.

Answer:

A single - gene trait is controlled by one gene and has distinct phenotypic classes following Mendelian inheritance. A polygenic trait is controlled by multiple genes and shows a continuous range of phenotypes often affected by the environment.