BIOLOGY 1M03 Lecture Notes - Lecture 10: Zygote, Leg Warmer, Erectile Dysfunction
5 Apr 2016
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Document Summary
If an asexual and sexual species reproduce at the same rate (eg. two ofspring per individual per generaion) the asexual species will outcompete the sexual species. This is true if one sex (males) do not produce ofspring. Compeiion among males can get rid of deleterious mutaions. This could give ofspring of sexual species an advantage: geneic recombinaion may provide an advantage to ofspring of sexual species. Why is geneic recombinaion useful: recombinaion potenially can separate good (advantageous) mutaion from bad (deleterious) mutaion a. Increases phenotypic variance: recombinaion can unit muliple advantageous mutaion that appeared in diferent individuals a. Increases variance of itness efects: filters out good from bad and potenially only reproduces good. In some sexual specie such as yeast all individuals are capable of reproducion. These species are isogamous meaning that all individuals produce gametes that are the same size. With these gametes no sexual selecion is expected because both parents contribute equally to the ofspring.
