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Lecture 15

BIOLOGY LECTURE 15.docx

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Department
Biology
Course
Biology 1001A
Professor
Tom Haffie
Semester
Fall

Description
BIOLOGY LECTURE 15 Sexual Selection No ReadingEcological Explanations for SexParasites place negative frequencydependent selection on host genotypesSex producing diversity of offspring genotypes favored in parasiterich environments Red Queen hypothesis running as fast as you can just to stay in one place Summary Sex is costly and inefficient but incredibly successfulLong term advantage purge harmful mutationsShort term advantage hedge bets against a quickly changing environment especially coevolving parasitesSex have important consequencesExplains sexually dimorphic traits and traits seemingly incompatible with natural selectionMany of these sexual dimorphic traits have no survivorship advantage they are purely for attracting the opposite sex for mating purposesIntrasexual VS Intersexual SelectionIntrasexual competition between memb
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