Biology 2483A Chapter Notes - Chapter 7: Asexual Reproduction, Isogamy, Parental Investment
3 Jan 2018
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Document Summary
Life history patterns vary within and among species. Life history: major events related to growth, development, reproduction, survival. Life history strategy: overall pattern in the timing and nature of life history events averaged across all the individuals in the species. Shaped by the way the organism divides its energy and resources between growth, reproduction and survival. Fitness: genetic contribution of an organism"s descendants to future generations. Optimal life histories maximize fitness but are subject to constraints. Allocation: relative amounts of energy or resources an organism devotes to diff functions. Morphs: discrete phenotypes produced by a single genotype with few or no intermediate forms. Growth rate increases with temp up to a point. Mode of reproduction is a basic life history trait. Today all prokaryotes and many protists, some multicellular organisms (polyps split off as clones) Anisogamy: two types of gametes that are diff sizes, most multicellular organisms. Can only transmit half of genetic material to offspring.
