BIO 121 Study Guide - Midterm Guide: Allele Frequency, Genotype Frequency, Gene Pool

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12 Dec 2018
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These evolutionary changes increase survivorship or reproduction: define and distinguish between: genetic drift, founder effect, bottleneck, gene flow. Allopatric speciation is when gene flow is interrupted when a population is divided into geographically isolated subpopulations. Polyploidy results in an extra set of chromosomes and sexual selection is when females select males based on their appearance. In sympatric populations, strengthening reproductive barriers could limit the number of unfit hybrids produced. The weakening of reproductive barriers could in turn increase the number of hybrids due to the gene pools of the two-species becoming increasingly alike aka speciation is reversing: compare and contrast gradual and punctuated equilibrium. Both are caused by mutation, genetic drift, gene flow or natural selection. Apical meristems aid in the cell division at the tips of roots and shoots, shoot apical meristems also generate leaves, aka used for growth. Sporangia is a multicellular organ that produces the spores. Gametangia is a multicellular organ that produces gametes.

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