Evolution Flashcards
evolution
descent with inherited modifications
micro-evolution
allele frequency changes from one generation to the next
macro-evolution
populations diverge over time
adaptation
a genetic variation that increases fitness
fitness
the amount of fertile offspring an organism has
variation
different types of traits
evolutionary science
make observations, form hypothesis, collect data
directional selection
one extreme is better than the other
stabilizing selection
average is better than both extremes
disruptive selection
both extremes are good, average is bad
predation selection
acts on both predator and prey
physiological selection
acts on body functions
natural selection
when traits that improve survival accumulate in the population
genetic drift
Frequency of traits changes in a population due to random chance
genetic draft
linked alleles hitchhike along with selected traits
