evolution exam Flashcards
evolution
change in the genetic make up of a population over many generations
What does evolution result in?
noticeable changes of traits in individuals
Natural selection
nature selects which variations and adaptations are passed on
gene pool
total number of alleles in a population
evolution occurs if there is a
change in frequency of alleles over time
variation
differences among individuals in a population
overproduction
when more individuals are born than can be supported in an environment
charles darwin proposed a theory of evolution by mechanism of
natural selection
speciation
firming new species
directional selection
extreme form of the trait, better fitness
disruptive selection
either extreme form of the trait, better fitness
stabilizing selection
average form of the trait, better fitness
purpose of hardy weinberg equilibrium
- examine changes in gene pool / allele frequencies
- how evolution can select for certain genes
- large population
- no mutations, gene flow, movement, natural selection
- random mating
conditions for hardy weinberg eq. to be true
genetic drift
chance events that change allele frequency