Daim duab 1: Schematic sawv cev ntawm kev tiv thaiv kev yug me nyuam, pib nrog premating teeb meem tiv thaiv tib neeg los ntawm kev xaiv ib leeg ua khub, tom qab ntawd kev sib cais gametic (postmating prezygotic) hauv cov poj niam cev xeeb tub thiab thaum kawg picturing ntau hom kev xaiv tawm tsam hybrids (postzygotic…
Gametic isolation yog dab tsi?
Kev Sib Ncaim Kev Ua Si: Kev sib cais ntawm kev sib deev qhov twg mating tshwm sim, tab sis txiv neej thiab poj niam gametes tsis tuaj yeem khi los ua zygote. Piv txwv li, cov proteins saum npoo ntawm cov qe ntawm ib hom tiv thaiv cov phev ntawm hom tsis ncaj ncees lawm los ntawm kev nkag mus.
Puas yog Gametic barrier Prezygotic lossis Postzygotic?
Kev cais ib puag ncig, kev coj tus cwj pwm cais, kev sib cais ntawm cov tshuab, thiab kev sib cais gametic yog cov txheej txheem uas ua rau prezygotic cais. Lub caij no, zygote tuag, tsis muaj kev vam meej ntawm hybrids, thiab hybrid sterility yog cov txheej txheem ntawm kev cais tawm tom qab.
Puas yog kev sib cais ntawm cov neeg kho tshuab puas yog Prezygotic barrier?
Prezygotic teeb meem: Txhua yam uas tiv thaiv mating thiab fertilization yog prezygotic mechanism. Kev cais neeg nyob ib puag ncig, kev cais tus cwj pwm, kev cais ib ntus, kev cais cov tshuab thiab kev sib cais gametic yog tag nrho cov piv txwv ntawm prezygotic cais mechanisms.
Qhov piv txwv ntawm Postzygotic isolation yog dab tsi?
Postzygotic teeb meem: Postzygotic barriers tiv thaiv ib tug hybrid zygote los ntawm kev tsimmus rau hauv ib tug zoo, fertile neeg laus. The mule yog ib qho piv txwv.
