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twin studies

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adoption study

Overview page. Subjects: Psychology.

In behaviour genetics, an investigation of the correlations between adopted children and either their natural parents or their adoptive parents (or both) on a measurable trait in order to...

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behavior genetics

Overview page. Subjects: Genetics and Genomics — Psychology.

A branch of genetics that concerns the inheritance of forms of behavior such as courtship displays, nest building, etc., in lower animals and intelligence and personality traits in humans....

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concordance

Overview page. Subjects: Science and Mathematics.

Agreement, harmony, being of like mind, thus pairs or other groups of people of identical phenotype, e.g., identical twins.

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discordance

Overview page. Subjects: Chemistry — Psychology.

1 In genetics, the proportion of monozygotic twins (or relatives of other known degrees of genetic relatedness) who display different forms of a particular characteristic or...

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dizygotic twins

Overview page. Subjects: Psychology.

Fraternal twins produced by two separate ova that have been fertilized simultaneously by separate sperms. Such twins are genetically no more alike than siblings. Compare monozygotic twins.

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heritability

Overview page. Subjects: Biological Sciences.

A measure of the extent to which a characteristic in an organism is related to genetic, inherited factors relative to the mean of the population.

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kinship study

Overview page. Subjects: Psychology.

In behaviour genetics, a comparison of the correlations between relatives of different known degrees of genetic relatedness on a measurable trait in order to estimate the heritability of...

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monozygotic twins

Overview page. Subjects: Psychology — Zoology and Animal Sciences.

Twins that are formed at some time during early development by the fission into two of the embryo derived from a single fertilized egg. Such twins are genetically identical and therefore...

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