PSY 244 Lecture Notes - Lecture 3: Xx Male Syndrome, Phenotype, Genomics
Document Summary
Nature and nurture: heredity and environment in uence individuals" characteristics, not either/or but and, modern genomics, similarity with other species, origins of individual differences are complex, three key elements. Phenotype: observable expression of the genotype, including body characteristics and behavior. Environment: every aspect of the individual, and his or her surroundings, other than genes. Parents" and child"s genotypes: genetic material is passed on as chromosomes- long threadlike molecules made up of dna- from offspring, d. Sex determination by sex chromosomes: female = xx, male = xy, a gene on the y- protein that triggers. Traits are governed by more than one gene. Pku: example of genotype-enviornemnt interaction phenylketonuria (pku)- caused by a defective gene on chromosome 12- Genetic transmission of diseases and disorders less than 5,000 human conditions are known to have genetic origin. Recessive gene: pku, sickle-cell anemia, tay-sachs disease, cystic brosis.
