PSYC 2110 Chapter Notes - Chapter 3: Meiosis, Heritability, Phenotype

• School: York University
• Department: Psychology
• Course: PSYC 2110
• Professor: Thanujeni Pathman

Document Summary

Galton (19th century): talent runs in families or it could"ve been that they were well-off and had more resources (environment > hereditary in this case) 2 twins that grew up separately both ended up becoming fire fighters, had many similarities including mannerisms. Mendel observed inheritance in pea plants, watson + crick + rosalind franklin helped id the structure of hereditary transmission (dna) Humans had less genes than estimated (~19000, had been estimated from 35000- 100000), and most of those genes are possessed by all living things. Relation 1: transmission of genetic info to child. 46 chromosomes (23 pairs) in nucleus of all cells except sex cells. One member of each chromosome pair inherited from each parent. Sex determined by presence of a y chromosome (not absence of an x) which encodes the protein that triggers prenatal formation of testes (produces testosterone). Mutations (positive or negative) can occur and be passed onto future generations.