Cov txheej txheem:

Hom kev tiv thaiv kev xeeb tub yog dab tsi?
Hom kev tiv thaiv kev xeeb tub yog dab tsi?

Video: Hom kev tiv thaiv kev xeeb tub yog dab tsi?

Video: Hom kev tiv thaiv kev xeeb tub yog dab tsi?
Video: Xeeb Tub Xeeb Ntxhai Yooj Yooj Yim Tsi Tag Siv Tshuaj 2024, Kaum ib hlis
Anonim

Cov no suav nrog lub sijhawm ntev muab cais nyob ib leeg , ecological muab cais nyob ib leeg , kev coj cwj pwm muab cais nyob ib leeg , thiab mechanical muab cais nyob ib leeg . Tom qab zygotic kev thaiv : kev thaiv uas tuaj ua si tom qab ob hom tau sib deev. Cov no suav nrog genetic incompatibility, zygotic mortality, hybrid inviability, hybrid sterility, thiab hybrid breakdown.

Hais txog qhov no, dab tsi yog 2 pawg ntawm kev tiv thaiv kev xeeb tub?

Muaj ob qhov kev faib loj ntawm kev thaiv rau kev yug me nyuam : ua ntej zygotic kev thaiv thiab post-zygotic kev thaiv . Pre-zygotic kev thaiv tiv thaiv hybridization ua ntej fertilization thiab post-zygotic kev thaiv tiv thaiv nws tom qab fertilization.

Qhov thib ob, peb hom Postzygotic teeb meem yog dab tsi? Prezygotic mechanisms suav nrog kev nyob cais , mating seasons, "mechanical" muab cais nyob ib leeg , gamete muab cais nyob ib leeg thiab coj cwj pwm muab cais nyob ib leeg . Postzygotic mechanisms suav nrog hybrid inviability , hybrid sterility thiab hybrid "kev tawg." Hauv evolution, ib lub ntsiab lus tseem ceeb yog dab tsi yog hom?

Ua li no, 8 qhov kev tiv thaiv kev xeeb tub yog dab tsi?

Cov ntsiab lus hauv cov teeb no (14)

  • Dab tsi yog 8 qhov kev tiv thaiv kev xeeb tub. lub cev nqaij daim tawv, kev coj cwj pwm, qhov chaw nyob, mechanical, gametic, hybrid inviability, hybrid sterility, thiab hybrid breakdown.
  • dab tsi yog lub cev.
  • tus cwj pwm yog dab tsi.
  • qhov chaw nyob yog dab tsi.
  • dab tsi yog mechanical.
  • dab tsi yog gametic.
  • dab tsi yog hybrid inviability.
  • dab tsi yog hybrid sterility.

4 hom kev cais tawm yog dab tsi?

Cov no yog ecological, lub cev nqaij daim tawv, kev coj cwj pwm, mechanical / tshuaj thiab thaj chaw

  • Ecological cais.
  • Kev cais ib ntus.
  • Kev cais tus cwj pwm.
  • Mechanical lossis Chemical Isolation.
  • Geographical Isolation.

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