EEB318H1 Study Guide - Final Guide: Species Problem, Evolutionarily Stable Strategy, Allopatric Speciation
2 Feb 2016
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Document Summary
It is said there is a two-fold disadvantage of sex. Asexually reproducing population will grow at twice the rate as sexually. Sexual reproduction is at disadvantage bc population must produce both sexes, but only half of them can give birth to an offspring. In contrast, all offspring of an individual from an asexually reproducing population can potentially give birth. combinations because each can successfully cross with the other, but recombination produces less successful progeny. In general, asexual reproduction preserves adaptive combinations of genes, whereas sexual reproduction breaks them down and reduces linkage disequilibrium between them: asexual reproduction, over the longer term, is disadvantageous. Asexual lineages are prone to extinction on the long term because it does not remove harmful mutations and does not give rise to genetic variations which evolution depends on. However, the long-term disadvantage does not affect the current generation because ns has no purpose/foresight.
