PSY210H5 Lecture Notes - Lecture 2: Y Chromosome, Twin, Heredity
Document Summary
Slide 56: the jim twins are identical, but were raised up separately, could be influenced by heredity. Slide 58: the 23rd pair of chromosomes is the sex chromosome, y chromosome always comes from the father. Slide 59: dna provides the chemical information. Slide 60: the genotype influences the phenotype and vice versa, what kind of genetic effects influence the phenotype. Slide 61: you can have 2 of the same of 2 different alleles for a trait, a recessive allele is present when the dominant allele is ignored. Slide 64: tay-sachs disease, develops very early, all of a sudden child stops meeting milestones and there is a degeneration of the nervous system, usually die within a few years of life. Slide 66: with down-syndrome there are physical features that allow us to see if individual is affected. Slide 67: y chromosome has much less information on it.
