Chapter 3 Assignment

Jamaal, Meera, and Kellsie

Twin Studies

Twin Studies is used to reveal the absolute and relative importance of genetic and environmental influences on individuals in a sample.
Identical Twins- ex. Tia and Tamera Mowry from Sister Sister.
Fraternal Twins- ex. Dylan and Cole Sprouse from The Suite Life of Zack and Cody.


It is the proportion of observed differences on a trait among individuals of population that is due to genetic differences.
Heritability- If a family has a history from suffering from alcoholism, than a child is more prone to becoming an alcoholic.
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Molecular Genetics

It is the field of biology and genetics that studies the structure and function of genes at a molecular level.
molecular genetics- ex. hair color and eye color are inherited.
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Natural Selection

It is the gradual process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment.
mutation- ex. Darius the giant rabbit in Worcester, England.
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Cultural Influences

It is historical, geographical, and familial factors that affect assessment and intervention processes.
Culture- Art is an example of culture.
Norms- Shaking hands is an example of a cultural norm.