Biology 1201A Study Guide - Final Guide: Primary Stages, Drosophila Pseudoobscura, Assortative Mating
11 Mar 2017
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Define, use, and recognize examples of relevant vocabulary: Understand the relationship between microevolution and macroevolution: macroevolution results from the accumulation of microevolutionary changes over time. Identify advantages and disadvantages of the different species concepts, and identify which is most appropriate given a scenario. Link reproductive isolation to underlying genetic differences between individuals/species: reproductive isolation mechanism- prevents gene pools of two species from mixing even when they are sympatric, divided into prezygotic and postzygotic isolating mechanisms. So frequently die as embryos/ early age (b) hybrid sterility- hybrid offspring cant form functional gametes (i) parent species differ in number/ structure of chromosomes, which cannot pair successfully during meiosis. Ex: mule (horse+ donkey) and zebroids (horse+ zebra) (c) hybrid breakdown- capable of reproducing, but their offspring have either reduced fertility/ viability. Identify novel examples of the various isolating mechanisms. Surface proteins on gametes of different species don"t match.
