HDFS201 Chapter Notes - Chapter 2: Senescence, Quantitative Trait Locus, Twin Study
17 Jan 2018
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Document Summary
Evolutionary psychology - emphasizes importance of adaptation, reproduction, and survival of the ttest in shaping behavior; natural selection favors behaviors that increase reproductive success. Using concepts of evolutionary psychology to understand development; extended childhood might have evolved because humans require time to develop a large brain and learn complexities of human societies. Social behavior is not strictly the product of evolved biology; bidirectional view - environmental and biological conditions in uence each other. Mitosis (ends with 23 pairs of chromosomes), meiosis (ends with 23 unpaired chromosomes), fertilization (egg and sperm chromosomes combine to form one set of 23 paired chromosomes, zygote) Sources of genetic variability - chromosomes in zygote are not exact copies of those in mother"s ovaries or father"s testes; possibility of mutated genes; susceptibility and longevity genes; for each genotype, a range of phenotypes can be expressed. Genetic principles: dominant-recessive genes, sex-linked genes, genetic imprinting, polygenic inheritance - most characteristics determined by interaction of many di erent genes.
