PSYC 100 Lecture Notes - Lecture 3: Quantitative Genetics, False Dilemma, Zygosity

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

Behaviour, thought and experience relates to genetics; mating and nding a mate. Recipe to make a human; 23 chromosome pairs, half from mom and half from dad. Genes expressed/written in diff ways; alleles; results in trait. Polygenic trait: take different elements to determine iq score; ex. ~25000 genes, 99. 5% of expressions are shared with those around us. Heterozygous: different alleles expressed in the pairs; dominant allele always wins. Monozygotic twins; from same zygote (egg) (43% concordance) Dizygotic twins: two eggs planted (17% concordance) Concordance: how similar twins are to one another. Adopted twins in separate houses; raised in separate ways; mz was 38%, dz was. Criteria for adaptive behaviour: obvious biological purpose, similar over culture and time, plausibly predicted ancestors" genetic success, not explained by simpler possibilities. If mate is an artist, your offspring might be creative but it"s not guaranteed.