PSY 1102 Chapter Notes - Chapter 4: Twin, Prenatal Nutrition, Prenatal Development

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1102
• Professor: Najwa Haddad

Document Summary

Nature, nurture, and human diversity: human families share biological heritage and behavioral tendencies, nature and nurture together shape our development every step of the way, with chimpanzees, humans share 96% of dna sequence. Identical twins developed from single fertilized egg (monozygotic): they are genetically identical. They have same genes, conception and uterus and usually have same birth date and cultural history. Although they have same genes, but not same number of copies: these twins share placenta during prenatal development, but one of three sets has separate pla(cid:272)e(cid:374)tas. O(cid:374)e t(cid:449)i(cid:374)(cid:859)s pla(cid:272)e(cid:374)ta (cid:373)a(cid:455) pro(cid:448)ide (cid:271)etter (cid:374)ourish(cid:373)e(cid:374)t, (cid:449)hi(cid:272)h contribute to identical twin difference: fraternal twins develop from separate fertilized eggs (dizygotic), they share a fetal environment, but they look like ordinary brother and sisters. Identical twins have 60% chances of getting same disease. Separated twins: separated identical twins are shown to have remarkable similarities. Molecular genetics the subfield of biology that studies the molecular structure and function of genes.