Genotype: The genetic makeup of an organism.
Phenotype: Observable traits resulting from genotype and environment.
Heritability: The proportion of variance in a trait attributable to genetic differences.
Twin and Adoption Studies: Research designs used to estimate genetic vs environmental influences.
Epigenetics: The study of how gene expression is influenced by environmental factors.
Polygenic Inheritance: Traits influenced by multiple genes, such as intelligence or height.