Psychology 1000 Lecture Notes - Lecture 9: Phenotype, Sickle-Cell Disease, Dyslexia

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Mike Atkinson

Document Summary

Discussion open until october 20 (counts for grade) What is dyslexia: reading problem, deficit in processing of graphic symbols, less electrical activity in the brain (bottom parietal lobe) Genetics of behaviour: nature (something we"re born with) vs nurture (something we learn, genes, strand-like molecules of dna, karyotype: genetic blueprint. No gene for intelligence: test for reaction time, genes determine range of possibilities (nature) but environment affects degree of expression (nurture) Critical period: environmental exposure at specific interval is critical, ex. White-crowned sparrow must hear adult song between 7th and 60th day to imitate song. Phenotype: outward expression of genotype (characteristics, behaviour, etc. ) Outward characteristics may not indicate underlying genetic contribution. Heterozygous alleles - consider dominant and recessive alleles. Dominant alleles: produce effect in either homozygous or heterozygous mode. Recessive alleles: produce effect only in homozygous mode. Not always one or the other, sometimes a blend: ex.