Biology / Unit 8 Bio 1785 review, 2 to 3 minutes
Tracing a Population's Adaptive Evolution from Mutation Through Fixation
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The idea
This capstone traces one population's adaptive evolution from a single new mutation, through the population-genetic forces that can change its frequency, to its possible fixation as directional selection favors it.
Where people slip
A new mutation's early survival depends heavily on genetic drift regardless of its eventual fitness effect — a beneficial mutation can still be lost by chance before selection ever gets the chance to act on its advantage.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- 1673Genetic Variation from Mutation and Sexual Reproduction
- 1675Neutral, Beneficial, and Deleterious Mutations
- 1741Hardy-Weinberg Equilibrium
- 1757Genetic Drift
- 1765Mutation as an Evolutionary Force, Population-Level
- 1773Directional Selection
- 1783Selection's Limits: No Perfect Organism, Not All Evolution Adaptive
Unlocks
- Nothing yet depends on this.
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