reproductive isolation Flashcards
1
Q
reproductive isolation
A
- prevents two or more species from exchanging genes
- geographic barriers
- will not interbreed when reintroduced
- incidental adaptations due to condition changes
- by-products of allopatric speciation
- final stage of speciation
2
Q
breeding different times of the year
A
- prevents mating opportunities
- eg. parrot species ; eagles
3
Q
species-specific courtship behaviour
A
- signal sexual readiness
- breeding display : grappling
- stridulating songs : male cicadas
- secretion of pheromones
- breeding plumage
4
Q
adaptation by plants to different pollinators
A
- particular pollinators
- eg. orchids by sexual deception and mimicry
- smell of flowers : flies
- nectar : humming birds
- dull-coloured with strong smell : bats
- unscented flowers : birds
5
Q
infertile offspring
A
- post-zygotic reproductive isolation
- eg. mule
