Evolution flashcards
Natural selection
natures way of spiking the best traits for survival.
struggle for existence
where organisms complete for resources, only the fittest survive
Reason for studying Lamarck’s ideas
they were part of learning about evolution, it shows how thinking changes over time
homologous structures
Different things that animals have in common. ex: bones, arms, etc
convergent evolution
when unrelated species evolve similar traits bc they live in similar environments
gene pools
a species involves into two or more new species
3 types of isolation
behavioral, geographic, temporal
species
groups of organisms
gene pool
the total collection of genes in a population at any time
allele frequency
refers to how often a particular allele appears in a population
mutations
changes in DNA sequences
Gene flow
individuals from one population move to another and breed mixing their genes with new population
sexual reproduction
shuffles genes during formation of sperm and eggs
single gene traits
controlled by 1 gene
polygenic traits
multiple genes working together
