9:16 Biological Evolution

Performance ability next generation no information not

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Unformatted text preview: ext generation. No - information not passed to next generation. Biological evolution: Change across generations followed by persistence. heritable: information: genetic modification potentially passed to the next generation (modified type) Note: potential is not the same as saying that it will happen. influences (not deterministic) activity: If there is a change that has the ability to persist because it is able to negotiate the reproductive obstacle course, it is biological evolution. modified phenotype = modified shape modified performance ability Yes - Biological evolution occurs: Is it able to negotiate the entire reproductive obstacle course? No - Biological evolution does not occur descent with modification followed by persistence. Reproductive races: -What is natural selection? performance based reproductive race -What is genetic drift? when chance factors make a difference in the reproductive route modified type zygote ancestral type Ancestral type will win if benefits are greater than costs. zygote Growth Development Survival Mating Fertility Parental Provisioning 6-2 Three parts to understanding biological evolution: 1. Origin of Life: origin of first reproductive loop we have not discussed Start with ancestral type introduce modification pattern of use/disuse mutilation extinction no somatic mutation germ-line mutation Is it heritable? yes Does it affect performance? 2. no Does it affect performance? yes For example: germ-line mutation modified genotype modified phenotype = shape modified performance ability no yes extinction Outcome of self-selection: Can it negotiate the reproductive obstacle course in the context of environmental circumstance? Is it in the same evolutionary population as ancestral type 3. Is it in the same evolutionary population as ancestral type no yes caught in a reproductive race natural selection: outcome of race determined by performance differences in the context of environmental circumstance ancestral type ousts modified type biological evolution occurs: modified type expected to persist genetic drift: outcome of race determined by chance factors biological evolution occurs: modified type replaces ancestral type ends without any lasting change: ancestral type persists, modified type goes extinct 6-3 Selection thinking: modified type Consider costs and benefits. zygote ancestral type zygote Growth Development Survival Mating Fertility Parental...
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