In lecture we discussed some inheritance patterns that are more complex than predicted by simple Mendelian genetics. When we say ‘simple Mendelian genetics’, this usually refers to [ Select ] . Human traits that follow Mendelian genetics can be tracked using [ Select ] . In contrast, the types of patterns we discussed that are more complex than simple Mendelian genetics included [ Select ] , which refers to when one gene affects more than one phenotypic character; and also situations where multiple genes contribute to a specific phenotype, which is called [ Select ] .