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Definition
| the study of the relative power and limits of genetic and environmental influences on behavior. |
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| every nongenetic influence, from prenatal nutrition to the people and things around us. |
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Definition
| threadlike structures made of DNA molecules that contain the genes. |
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Term
Deoxyribonucleic Acid
(DNA) |
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Definition
| a complex molecule containing the genetic information that makes up the chromosomes. |
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Definition
| the biochemical units of heredity that make up the chromosomes; a segment of DNA capable of synthesizing a protein. |
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Definition
| twins who develop from a single fertilized egg that splits in two, creating two genetically identical organisms. |
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Definition
| twins who develop from separate fertilized eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment. |
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Term
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Definition
| a person’s characteristic emotional reactivity and intensity. |
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Term
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Definition
| the interplay that occurs when the effect of one factor (such as environment) depends on another factor (such as heredity). |
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Definition
| the study of the roots of behavior and mental processes, using the principles of natural selection. |
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Term
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Definition
| the principle that, among the range of inherited trait variations, those that lead to increased reproduction and survival will most likely be passed on to succeeding generations. |
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Term
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Definition
| a random error in gene replication that leads to a change. |
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Term
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Definition
| in psychology, the biologically and socially influenced characteristics by which people definemale and female. |
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