BIOL 1001 Lecture Notes - Lecture 15: Eye Color, Allele Frequency, Genetic Variation
23 Feb 2017
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It"s the pro(cid:272)ess through (cid:449)hi(cid:272)h the (cid:272)hara(cid:272)teristi(cid:272)s of orga(cid:374)is(cid:373)s change over successive generations by means of genetic variation & natural selection. Its is defined as changes in gene frequencies in most populations. Microevolution: changes in genetic characteristics of a population overtime; allele frequencies change in populations over time. It happens within a single population; small evolutionary changes within a species or population. Microevolution can lead to macroevolution as changes become more pronounces & 2 distinct species emerge. Macroevolutions: decent of different species from a common ancestor over many generations. Focuses on changes that occurs above levels of species. Both macro & micro are caused by mutations, genetics, drift, gene flow or natural selection. Microevolution: allele frequencies change in population change over time. Explain patterns & organization of genetic variation in population. Explain origin & maintenance of genetic variation in populations. Understanding mechanisms that cause allele frequencies changes in populations. Phenotypic variations: the nature of variation of characteristics.
