Non-Mendelian Inheritance

Not all patterns of inheritance can be explained by Mendel’s simple dominant/recessive pattern. Traits like incomplete dominance, codominance, blood type, muscular dystrophy, and sex-linked traits are all considered non-Mendelian inheritance.

A pedigree is a chart that is used to explain patterns of inheritance within a family or close gene pool.  A pedigree is  a family tree showing how specific trait that runs in the family that may or may not by passed on from generation to generation. This chart explains how the genotypes and phenotypes of a family can vary.

Mendel was also unable to explain how certain environmental factors like chemicals, pollution, organic substances, and UV radiation change of cause genetic mutations. Chromosomes and DNA can be damaged and changed to code the proteins or other genetic information.