Expanding on Mendelian Genetics

The video revisits Mendelian genetics and highlights the limitations of the basic model, introducing incomplete dominance and codominance.

Explains how dominant alleles are related to enzymatic activity, using the example of seed shape in peas.

An explanation of multiple alleles with the example of human blood types, discussing how IA, IB, and i alleles produce different blood types.

Discusses pleiotropy, where a single gene affects multiple phenotypes, and epistasis, where one gene affects the expression of another.

Explores polygenic inheritance resulting in continuous variation, like skin color, and highlights multifactorial traits influenced by environmental factors.

Summarizes the expanded understanding of genetics beyond Mendelian principles, including the implications for studying genetic disorders.