1.1: Interaction of Heredity and Environment

Nature

The influence of genetics and biological factors on behavior and mental processes.

Nurture

The influence of environment and experience on behavior and mental processes.

Epigenetics

The study of how environmental factors can affect gene expression wtihout altering the DNA sequence.

Identical Twins (Monozygotic Twins)

Twins that develop from a single fertilized egg that splits, creating two genetically identical organisms.

Fraternal Twins (Dizygotic Twins)

Twins who develop from two different eggs fertilized by two different sperm, sharing about 50% of their genes.

Heritability

A statistical estimate of how much variation in a trait within a population can be attributed to genetic differences.

Heredity

The passing of traits from parents to offspring through genes.

Eugenics

A controversial and unethical movement aimed at improving the genetic quality of the human population, often through selective breeding.

Plasticity

The brain's ability to change and adapt as a result of experience, especially during childhood or after injury.

Genetic Predisposition

Increased likelihood of developing a particular disease based on genetics.