Biology 1202B Lecture Notes - Lecture 1: Adaptation, Speciation, Peptide
23 Aug 2016
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Document Summary
Biologists wonder if a decrease in population, would cause a reduction in genetic variability. Reduction in genetic variability can have adverse effects on the population"s reproductive capacity, resistance to disease and ability to survive unfavourable environmental changes. A situation in which a population regrows from small number is known as bottleneck. Microevolution a change in frequencies of alleles or heritable phenotypic variants in a population over time. Population all the individuals of a species that live together in the same place and time. Darwin recognized natural selection can change the pattern of variation. Microevolutionary change results from several processes, not just natural selection, sometimes these processes counteract each other. In some populations, individuals vary dramatically in appearance. In other populations, individuals look similar but not identical. Phenotypic variation differences in appearance or function among individuals of a population. Is a difference is heritable, it is passed from generation to generation.
