PSYB30H3 Lecture Notes - Lecture 6: Umber, Cell Nucleus, Heritability
Document Summary
Cell biology basics: cell nucleus contains dna, carries genetic info, controls growth and development and23 pairs of chromosomes. Gene expression: genotype vs. phenotype: geno- specific genetic makeup, phenol- how genetic makeup is expressed. Co-dominance and incomplete dominance (neither dominant or one dominant doesn"t hide effect of other) co-dominance: both expressed and incomplete combination expressed) Genotype-environment interactions (impact of environment depends on genotype): examples: religious upbringing reduces influence of genetic factors on disinhibition) G-e correlation: differential exposure of individuals with different genotypes to different environments: Passive: parents provide both genes and environment to children (child"s verbal ability and he umber of books in home) Reactive/evocative: parents (or others) respond to children depending on the genotype (baby"s liking for cuddling and mothers cuddling behavior) Active: person with particular genotype seeks out environment (high sensation seekers expose themselves to risky environments) Genotype-environment correlation: genotype-environment correlations can be positive or negative.
