PS263 Chapter 4: PS 263 ch 4 textbook
Document Summary
Genes- units of heredity that maintain their structural identity from one generation to another. Dominant-gene that shows a strong effect in either the homozygous or heterozygous condition. Homozygous- having two identical genes for a given characteristic. Evolutionary psychology- field that deals with how behaviors evolved. Phenylketonuria (fee-nil-keet-uhn-yoor-ee-uh), or pku- a genetic inability to metabolize the amino acid phenylalanine. Autosomal genes- all chromosomes other than x and y. Kin selection-selection for a gene that benefits the individual"s relatives. Reciprocal altruism- helping others who may be helpful in return. Sex-limited genes-gene that exerts its effects primarily in one sex because of activation by androgens or estrogens, although members of both sexes may have the gene. Artificial selection- a process of selecting plants/animals for desired traits. Mutation- a heritable change in a dna molecule. Epigenetics- a field that deals with changes in gene expression without modification of the dna se- quence. Deoxyribonucleic acid (dna)- double-stranded molecule that is part of the chromosomes.
