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Heredity and Environment
The New Baby
The Workings of Heredity
37 other sections not shown
achievement afflicted ancestor appear average baby behavior believe birth blood types body born boys brain cancer carrying cause cells cent chance Chapter chemical child childhood color blindness congenital crime criminal develop diabetes dominant gene effects environment environmental factors ethnic evidence eye color fact father female fraternal twins genetic genius girls given hair hemophilia hereditary factors heredity homosexuality hormones human Huntington's chorea identical twins inborn incidence individuals infants influences inherited intelligence involved less living longevity lower animals males mate melanin ment mental defect mental disease Mongolian mongoloid mother musical mutations Negroes normal nose offspring pair parents persons pigment possible prenatal produce puberty race rare recessive genes relatives result Rh disease schizophrenia sex differences sex organs sex-l sex-linked sexual skin color social sometimes species sperms stature syndrome talent tend tendencies tests theory tions traits TURNER'S SYNDROME usually various women X chromosome