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Definition
| Twins who develop from seperate fertilized eggs. They are genetically no closer than brothers and sisters, by they share a fetal environment. |
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Definition
| A person's characteristic emotional reactivity and intensity |
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Definition
| The proportion of variation among individuals that we can attribute to genes. The heritability of a trait may vary, depending on the range of populations and environments studied. |
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Definition
| The effect of one factor (such as environment) depends on another factor (such as heredity) |
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Definition
| The subfield of biology that studies the molecular structure and function of genes. |
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Definition
| The study of the evolution of behavior and the mind, using principles of natural selection. |
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