04:08
The Search for Intelligence: Environmental and Genetic Influences on Intelligence
Intelligence represents an interaction between genes and environment. Genes for abilities may not be totally additive, a concept known as emergenesis. Hundreds of genes may contribute a small amount of variance to a particular trait like reading dis...
03:31
Codes of Life: Gene-Environment Interaction
Using twin and adoption studies, behavior geneticists can mathematically estimate the degree to which variation among individuals can be attributed to their differing genes. The concept is heritability, the extent to which genes predispose certain...