Please enable JavaScript.
Coggle requires JavaScript to display documents.
Speciation and Extinction, Types of prezygotic reproductive barriers -…
Speciation and Extinction
Speciation
Formation of a new distinct species from a pre-existing species
Populations become Isolated into different environment
Favorable adaptations gradually accumulate
Populations become so distinct, they no longer interbreed
New species is eventually formed!
Speciation cont.
Example:
Geographic isolation (river flow changed and isolated some mice)
Reproductive isolation (they are only mating with their separate population)
Population evolves (adaptations accumulate in the different environments)
Reproductive barriers (they will no longer be able to mate with the originals)
= NEW SPECIES
Species
Group of individuals who can actually, or potentially interbreed and produce fertile offspring
Different species can reproduce but the offspring are sterile or hybrid
Fertile offspring
offspring that can reproduce when they become of age
Adaptive Radiation
rapid speciation of MANY species from a single ancestral species
Types of prezygotic reproductive barriers
Prevents formation of a zygote
Habitat Isolation
Temporal Isolation
Behavioral Isolation
Gametic Isolation
Mechanical Isolation