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Variation can be measured in three ways: range,percentile,and
Dizygotic Twins
Twins resulting from the fertilization of two different eggs by two different sperm, sharing 50% of their genes, similar to ordinary siblings.
Genetic Influence
The impact of genes inherited from parents on the traits and behaviors of an individual.
Genetic Heritability
The proportion of variation in traits within a population that is due to genetic differences among individuals.
Extraversion-Introversion
A personality dimension that contrasts tendencies toward sociability, enthusiastic activities versus reflection, and quiet activities.
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