speciation and genetic drift
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9 Terms
define speciation
the development of a new species
how does speciation occur
populations become reproductively isolated
how does allopatric speciation occor
geographical isolation
how does sympatric speciation occur
reproductive isolation with out a physical barrier
describe how a new species forms during allopatric speciation
each population experiences different condition & selectional pressures
cause a different allele frequency
directional selection occurs
describe how a new species forms during sympatric speciation
random mutations prevent interbreeding within a population
what are the 3 ways reproductive isolation can occur
seasonal
mechanical
behavioural
how does genetic drift lead to speciation
chance dictates which organisms survive and reproduce to pass on alleles
how has evolution lead to diversity of organism
millions of year of speciation
population divide and new populations form new species
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