BIOLOGY 1M03 Lecture Notes - Lecture 12: Petal, Erythranthe Lewisii, Red
17 Sep 2016
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Cost of sex (called two-fold cost of sex, or 50% cost of meiosis) page 260-1. Yes, fitness (genetic representation in next generation) is important. But in a population where all moms produce 10 offspring, each mom will produce. 5x her genes, each dad on average will produce 5x his genes (each offspring has half the genes of its parents). But if a mutant is able to reproduce asexually, she has doubled her fitness (genetic representation in next generation) to 10x her genes. A fit phenotype is reproduced, so no change in fitness in offspring, but also no genetic variation. No problem with finding mates costs of finding and attracting mates adds to the costs of sex. In population biology, they think of it as the cost of males. A population of females producing females can increase in size twice as fast. Plants very good at asexual reproduction (form of local movement)
