Evolution (Selection - other evolutionary theories) Flashcards
Speciation is when…
A first specie gives rise to a different specie
For speciation to happen, both organisms that are mating have to be…
Reproductively isolated
Reproductive barriers are….
Barriers that isolate a specie.
Geographical barriers are….
physical boundaries, that stop species from sharing the same space
Example of geographical isolation.
Chimpanzees and bonobos, isolated by the congo river
Temporal Isolation happens when….
different species are separated because of migratory movements.
Example of temporal isolation.
Female dogs can get pregnant 2 times per year, when they have periods
Chromosomal isolation is when the number of…
Structure os the chromosomes start showing differences, so gametes are incompatible
Example of chromosomal isolation:
Chimps and humans, they are not compatible anymore
Behaviourl isolation happens when the apperance…
of different traits that match behaviours of different individuals in a population, trigger a reproductive barrier.
Example of behavioural isolation:
Male fireflies make a specific light pattern to attract females.
What are other evolutionary theories
Neutral theory and Punctuated equilibrium theory
