HEREDITARY AND ENVIRONMENTAL FACTORS & TWIN STUDIES

Hereditary

Genetically passed down from biological parents to offspring

Environment

An individuals physical or social surroundings

Heritable traits

Expression of certain genes that biological parents hold

Genetic predisposition

Increased likelihood to develop certain traits if certain conditions are met

Example of genetic predisposition

A child's family has a history of depression so they're more likely to experience it

Examples of nature

- Eye colour

- Hair colour

- Intelligence

- Personality

- Body type

Examples of nurture

- Cultural norms

- Language

- Education

- Location

- Sun exposure

Environmental factors

- Education

- Socioeconomic status

- Social groups

- Physical surroundings

Fraternal

- Dizygotic

- Share 50% similar genes

Identical

- Monozygotic

- Share 100% similar genes

Alike

If a characteristic is largely based on hereditary the identical twins should be more _____.

differences

If a characteristic is largely based on environment the identical twins should be more __________.

Limitations of twin studies

To conclude differences are due to hereditary is risky as they may be exposed to the same environmental factors