Natural Selection Flashcards
Natural Selection on Polygenic traits can affect the?
Relative fitness of phenotypes and produce three types of selection
directional, Stabilizing, Disruptive
Natural Selection on Single-gene traits can lead to?
Changes in allele frequencies which change phenotype frequencies
Ex:Lizard color
What is Directional Selection?
Individual’s on ONE END of the bell curve have HIGHER fitness
Than individual’s in the middle of other end of the curve
What is Stabilizing Selection?
When individual’s near the CENTER of the curve have HIGHER fitness than individual’s on either end
What is Disruptive Selection?
When individual’s at the SIDES of the curve have higher fitness than individual’s near the middle of the curve
Disruptive Selection creates what?
Two distinct phenotypes
A random change in allele frequency is called?
Genetic Drift
