11.3 Other Patterns of Inheritance – We continued to describe the other inheritance patterns. Mendel’s experiments could not predict the outcome of traits that involve multiple alleles. That is when more than 2 alleles are involved in a phenotype such as four different coat colors in rabbits. Polygenic traits are controlled by the interaction of two or more genes that exhibit a wide range of phenotypes. An example of polygenic traits is the wide variety of skin color in humans.