Bio 201 S14 Class 4 2 3 14 v2(2)

Slide 13 13 adap4ve trait loss and trait gain work by

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Unformatted text preview: erred any fitness advantage. SLIDE 8 SLIDE 9 10. No trait is inherently fit •  The fitness of a trait is also dependent on how fit it is rela4ve to other traits in the popula4on. –  Traits considered fit are those that are fit enough to allow rela%vely high survival and SLIDE 10 reproduc4on. Rela4ve fitness: 1 0.35 Assume = fiaest possible phenotype SLIDE 11 11. Popula4ons evolve and adapt, individuals do not •  An individual’s genes do not change across their en4re body during their life4me. Because their genes cannot evolve, they cannot adapt. •  Evolu4on refers to a change in allele frequencies from one genera4on to the next. –  An individual does not have a frequency or genera4ons. SLIDE 12 12. New muta4ons and traits do not appear because they are needed •  All traits originate as the result of random muta4ons – muta%ons are random •  Organisms have traits because they inherit them from their pa...
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