PSYC 250 Chapter Notes - Chapter 3: Phenylalanine, Grey Matter, Neurogenesis
15 Dec 2015
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Document Summary
Phenotype: observable expression of the genetype including both body characteristics and behaviour. Environment: every aspect of an idividual and his or her surroundings other than genes. Chromosomes: molecules of dna that transmit genetic info. Dna: molecules that carry all the biochemical instuctions involved in the formation and functioning of an organism. Genes: sections of chromosomes that are the basic unit of heredity in all living things. Sex chromosomes: chromosomes x&y that determine and individuals gender. Mutation: a change in a section of dna. Crossing over: process by which sections of dna switch from one chromosome to the other. Genes influence development and behaviour only when turned on. Regulator genes: genes that control the activiy of other genes. Alleles: 2 or more different forms of a gene. Dominant allele: allele that if present gets expressed. Recessive allele: allele that is not expressed if a dominant allele is present. Homozygous: having two of the same allele for a trait.
