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TWO ADDITIONAL COMPONENTS OF HUMAN SEXUALITY - page 9 / 29

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HERITIBILITY

Estimate of how much of the variation in a trait is genetic and how much is environmental

One method of doing this is by twin studies

Compare how alike ( or concordant) identical twins are with how alike fraternal twins are for the same trait

Identical twins have the same genotype, if reared together have similar environment

Fraternal twins have different genotypes but similar environment

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