Psychology 1000 Chapter Notes - Chapter 4: Twin, Gregor Mendel, Twin Study
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PSYCH 1000 Full Course Notes
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For centuries, humans have known to physically resemble parents and siblings. Is found in every cell in the human body. Is organized into 46 chromosomes (23 pairs in almost all cells), 23 from each parent. Genetic inheritance long known that parents pass on certain characteristics, before genetics it was believed that it was a blend". Complications: most human traits are not determined simply by a single gene, polygenic transmission: Many genes combine to influence a single phenotypic trait (i. e. eye colour, intelligence, height) Magnifies the number of possible combinations of genes 70 trillion possible genotypes. Massively complicates the study of potential genetic influences on traits, behaviours. Helped children grow because they don"t produce enough. Decide whether to have children based on probabilities of them having certain issues or not. Amniocentesis typically at 15-20 weeks of fetal development. Parents must decide whether to keep/terminate pregnancy. Counsellors may anticipate the desires of the parents abortion seen as default option.