Lecture 5 Flashcards
1
Q
what is a species
A
it can be populations that interbreed to produce fertile offspring
2
Q
what are reproductive barrier
A
they inhibit gene flow between populations allowing evolutionary divergence, it occurs because alleles change
3
Q
what are the prezygotic barriers
A
Habitat isolation(live near on one) temporal isolation(different mating time) behavioural isolation(different courting calls) mechanical isolation(they dont fit) gametic isolation(gametes wont match)`
4
Q
what are postzygotic barriers
A
hybrid inviability(no chance of survival ) hybrid infertility (no kids) and hybrid breakdown
5
Q
what is allopatric speciation
A
Geographic barrier blocks gene flow between populations
6
Q
what is sympatric speciation
A
new species arise within range of the parent population
