Topic 3 Flashcards

what are 2 types of reproductive isolations

prezygotic and postzygotic

what are prezygotic barriers

prevents interbreeding

what are types of prezygotic barriers

habitat, behavioral, temporal, mechanical, gametic barrier

what are postzygotic barriers

hybrids dont exist post fertilization

what are types of postzygotic barriers

hybrid viability, hybrid sterility, and reduced f2 fitness

what are modes of speciation

generation of new species by geographic relationship to ancestor

what are 2 types of speciation

allopatric and sympatric

what factors contribute to adaptation

isolation, time, food source, and environment

habitat isolation

same area, different parts

behavioral isolation

same language

temporal isolation

mating at different times

mechanical isolation

physical barriers

gametic barrier

unsuccessful fertilization

hybrid vaibility

incomplete embryonic stage

hybrid sterility

hybrid lives without ability to reproduce

reduced f2 fitness

hybrid lives and reproduces, but offspring is weak,

allopatric speciation

divergence in population due to a geographical barrier

sympatric speciation

new species within the range of ancestral species

adaptive radiation

descent species from one ancestor; type of allopatric speciation