Biology 1001A Lecture Notes - Lecture 17: Gamete, Convergent Evolution, Resource Holding Potential
30 Apr 2015
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Lecture 17 sexual selection lecture outcomes: lottery ticket hypothesis and red queen hypothesis to describe the relationship between environmental stability and benefits of sexual vs. Females: sexual dimorphism, differences in male and female morphology and behavior, sexual selection depends on struggle between males for possession of females, relationship between sexual selection and investment in offspring. Individuals who have higher investment in offspring are more choosy when selecting a mate (usually males but can be females: generally, males = increase fitness by copulating with more females. Not choosy: females = focused on offspring quality. Very choosy: role of parasites as an explanation for the persistence of sexual reproduction. Tanya malhotra: convergent evolution of horns and other weapons, very large body size in males (bigger = better) Female fitness: fitness in males determined by maximum offspring quantity, fitness in females determined by maximum offspring quality, traits valued in mate choice by human males vs.
