7.9 and megasheet - prezygotic mechanisms

what signifies a prezygotic mechanism?

prevents zygotes from forming at all

what are the prezygotic mechanisms? (5)

temporal, behavioral, mechanical, gametic, chemical isolation

what is temporal isolation?

species reproduce at different times

what is an example of temporal isolation?

nocturnal vs diernal fireflies

what is behavioral isolation?

diffrent species have different courtship behaviors or mating rituals

what is an example of behavioral isolation?

firefly mating blink patterns

what is mechanical isolation?

reproductive structures of two species are incompatible

what is gametic isolation?

gametes of different species cannot fuse/recognize each other

what is an example of gametic isolation?

caused by different number of chromosomes

what is chemical isolation?

pheremones from one species doesn't attract/repel another

what is an example of chemical isolation?

female moths > pheremones only male moths react to