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At about eight months of age, people across the world start to ________ strangers; as adults, they prefer the company of those whose attributes are ________ to their own.
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fear; similar
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The study of the relative power and limits of genetic and environmental influences on behavior and personality traits is known as
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The study of the relative power and limits of genetic and environmental influences on behavior and personality traits is known as
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A human sperm cell contains
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A human sperm cell contains
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Depending on environmental conditions, specific genes can be either
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active or inactive.
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The genome is the complete
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set of genetic material in an organism's chromosomes.
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Identical twins originate from the fertilization of
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a single egg cell by a single sperm cell.
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DNA is a complex
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molecule
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Twin studies suggest that Alzheimer's disease is influenced by
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heredity.
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Compared with identical twins, fraternal twins are ________ similar in neuroticism and ________ similar in risk of divorcing.
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less; less
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The home environment most clearly has a greater influence on children's ________ than on their ________.
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religious beliefs; personality traits
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An infant's temperament refers most directly to its
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emotional excitability.
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One form of a gene that regulates the neurotransmitter serotonin contributes to the development of
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a fearful temperament.
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The ability to provide would-be parents with information regarding their fetus' risk for a learning disorder is a potential benefit of
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molecular behavior genetics.
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Gender differences in heritable personality traits cannot necessarily be attributed to male-female genetic differences because
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heritable traits can be influenced by social environments.
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Evolutionary psychology studies the evolution of behavior and the mind using principles of
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natural selection.
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