Speciation and Phylogeny Flashcards
the formation of new and distinct species in the course of evolution
speciation
the evolutionary development and diversification of a species or group of organisms, or of a particular feature of an organism.
phylogeny
what are the four concepts that make a new species
biological species concept
morphological species concept
ecological species concept
phylogenic species concept
what is the biological species concept
of they can mate and have viable offspring they are the same species
when genes from spec ies get dumped into another gene pool
introgression
[hybridization]-
mixing of gene pools
backcross
mixing of gene pools
backcross
what is the morphological species concept
members of the same species look alike
downside of biological species concept
not all members of the same species naturally mate
what is the ecological species concept
if the occupy different ecological niched they are different species.
what is a down side of morphological species concept
mimicry
what is a downside of ecological species concept
some members of the same species occupy different niches
what gene should you look at when you want to come two species
mitochondria
what needs restricted gene flow barriers
speciation
what are two types of barries
pre-zygotic and post-zygotic
what are the two types of speciation
allopatric
sympatric
when lands split physically because of a barrier causes the population to spilt as well
vicariance
what is allopatric speciation
different father land
the land spilt because of a natural barrier causing pop to split
what is sympatric speciation
same land different species
what is the rate of speciation
tends to boom then bust
illustration of speciation happening
phylogenic trees
what is the principle of parsimony?
simplest explanation is correct
what are the different phylogenic groups
monophyletic
paraphyletic
polyphyletic
what are the definitions of the phylogenic groups
look at notes
