Twin research methods adopted by medical and behavioral science investigators for examining genetic and environmental influences on human characteristics.
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D002648:Child; D002653:Child Behavior Disorders / Q000235:genetics* / Q000523:psychology; D002675:Child, Preschool; D004200:Diseases in Twins / Q000235:genetics* / Q000523:psychology; D005260:Female; D005838:Genotype; D006801:Humans; D007223:Infant; D008297:Male; D010641:Phenotype; D012307:Risk Factors; D012931:Social Environment; D014429:Twins, Dizygotic / Q000235:genetics / Q000523:psychology; D014430:Twins, Monozygotic / Q000235:genetics / Q000523:psychology