Psychology 1000 Lecture Notes - Lecture 10: Heritability, Autosome, Tyrosine

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Next time: evolution & behaviour (finish ch. 4) Traits related to action of more than 1 gene or chromosome. Heritability (h2 = variance due to genes / total variance: estimate of how much observed variability due to genetic factors alone, h2 = 0. 0 (due to environment) Heritability of intelligence family relationship studies. 12. 5: reunite twins separated at birth/young age and sees remarkable similarity, identical twins, apart. 0. 87: h2 = 0. 72, not saying that iq is genetically determined, of the observed variability in measured iq, we can attribute 72% to genetic factors. Sir cyril burt: large scale study of times reared apart, reports h2 approaching 1. 0, came up with the streaming system in school (academic, applied, essential) How many genes: early estimate 100,000, genome project 25. 000. Five to seven of these are defective . Lack of enzyme that converts phenylalanine (found in milk) to tyrosine. Results in brain damage and sever intellectual disability. Lack of enzyme that breaks down fatty acids.