Biology 1002B Lecture Notes - Lecture 24: Sperm Donation, Pleiotropy, Sexual Selection
9 Apr 2016
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If a trait is very helpful during early life, but very harmful during later life, A: organism won"t make it to late life either way selection is stronger during early life, because there is a good chance any given. Selection should favour alleles that increase reproduction early in life, even at the expense of reproduction or survival late in life. Humans aging; it"s not that the body is incapable of repairing itself, it"s that it"s not worth it" for the body to bother repairing tissues. Mutant indy outlive wild drosphola, but produce fewer offspring. Pathogens and parasites keep evolving: to steer their evolution, change their ecology. Effects of history: different selective pressures that in the past, historical constraints. The body is a bundle of compromises: energy towards attracting a mate or repairing the body. Selection acts on lifetime reproductive success, not on health, happiness or longevity.
