EEMB 2 Lecture Notes - Lecture 10: Multicellular Organism, Fecundity
17 May 2018
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Sexual selection can favor traits that reduce survival:
● Trade off between survival and mating success
● W=Survival X Fecundity X K (Offspring relatedness)
● We know more about the genetics of the fruit fly than any other multicellular
organism
● We also know more about sex and sexual selection in the fruit fly than any other
organism
● Good Genes: display trait reflects genome quality-higher quality survival trait
○ Low quality of D (# mildly deleterious mutations in the genome=measure
of genetic quality) are better=more exaggerated indicator traits
○ I.e. female peacock experiment: females that mated with bigger
tails=offsprings survived better
○ Limits of survival selection stops good genes exaggeration-the moment
where there safet is threateed because of the excessive growth or
emphasis on the size of the trait
● Materials Benefits Model-better resources, better provider
○ M=the phenotypic quality of a male to provide resources for a female
○ Tail size and color is an indicator trait
find more resources at oneclass.com
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Document Summary
Sexual selection can favor traits that reduce survival: Trade off between survival and mating success. W=survival x fecundity x k (offspring relatedness) We know more about the genetics of the fruit fly than any other multicellular organism. We also know more about sex and sexual selection in the fruit fly than any other organism. Good genes: display trait reflects genome quality-higher quality survival trait. Low quality of d (# mildly deleterious mutations in the genome=measure of genetic quality) are better=more exaggerated indicator traits. I. e. female peacock experiment: females that mated with bigger tails=offsprings survived better. Limits of survival selection stops good genes exaggeration-the moment where the(cid:369)(cid:910)re safet(cid:369) is threate(cid:290)ed because of the excessive growth or emphasis on the size of the trait. M=the phenotypic quality of a male to provide resources for a female. Tail size and color is an indicator trait.
