Psychology 1000 Lecture Notes - Lecture 4: Twin, Cyril Burt, Sickle-Cell Disease

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

Document Summary

Genetic: how do genes work, what is the outcome of recessive genes, how is more complex behaviour coded, genes = strand-like molecules of dna linked on chromosomes. Nature vs. nurture: nature something born with. Influence of genes through protein synthesis: gene action, humans: 23 pairs (22 autosomal, 1 sex, karyotype = genetic blueprint. Influenced by environment too: genes rna protein, no genes (cid:498)for(cid:499) a particular attribute, nurture something learned/acquired, genotype set of genes inherited, phenotype the outward expression of genotype, genotype phenotype. ***genes determine range of possibilities, but not degree of expression: ex. White-crowned sparrow must hear adult song between: environmental exposure at specific interval is critical. 7th and 60th day or it won"t develop birdsong: characteristics may or may not be indicative of dna. Homozygous vs. heterozygous: alleles: homozygous predictable phenotype, heterozygous unpredictable. Sickle cell anemia: heterozygous yields both normal rbc and sickle cell. Polygenetic effects: character (traits) due to expression of many genes or chromosomes.