Heredity Overview — AP Biology
1. Unit at a Glance
We build this unit from the cellular foundation of heredity up to complex inheritance patterns. We start with the process of meiosis, how it differs from mitosis, and how it generates the genetic variation that drives inheritance. Next, we cover the foundational rules of Mendelian genetics, then expand to common non-Mendelian exceptions to these rules.
We end the unit by connecting inheritance to chromosome structure and exploring how environmental factors interact with genotype to shape final phenotype. This sequence connects cellular biology to organismal trait expression, building the base for units on gene expression and evolution.
Common Pitfalls
Why: Mixing up these processes leads to incorrect predictions about gamete genotype and inheritance.
Why: Most complex traits do not follow these simple ratios, leading to wrong phenotype predictions.
Why: This ignores the major role environment plays in shaping most observable traits.