increased homozygosity

More documents

Recommendations

Info

Intrasexual selection… Alternative male mating strategy: sneaky males e.g., many fish species e.g., dimorphism in male Rhinocerous beetles: Males that battle for and guard females vs. Small males that sneak into females’ tunnels Disruptive sexual selection on male morphology Three male mating strategies in lizard: a) ‘Ultradominant’: territory with multiple females b) Small, carefully guarded territory: 1 female c) No territory, sneak in on ultradominants negative frequency-dependent selection Side-blotched lizard Forms of intrasexual selection… 2. Sperm competition: • Remove competitors’ sperm • Plug female genitalia following mating • Produce more sperm (larger testes) • Repeated matings Polygamous primates produce more sperm Damselfly penis has horn that removes other males’ sperm Futuyma, Fig. 14.7 12
Forms of intrasexual selection… 3. Infanticide: Accounts for 25% of all lion cub deaths in first year of life 10% of lion mortality overall Puma cub 13
Page 1 and 2: Inbreeding, continued… Evolutiona
Page 3 and 4: Inbreeding reduces heterozygosity
Page 5 and 6: Mechanisms that prevent inbreeding
Page 7 and 8: Why self-fertilize Advantages: 1) *
Page 9 and 10: Why is there competition for mates
Page 11: Evolutionary consequences of direct
Page 15 and 16: Intersexual selection: mate choice
Page 17 and 18: Explanation 2: Sensory bias. Intrin
Page 19: Explanation 3: Indirect benefits. F

increased homozygosity

Create successful ePaper yourself

Delete template?

Save as template?