Cov txheej txheem:

Postmating isolation yog dab tsi?
Postmating isolation yog dab tsi?

Video: Postmating isolation yog dab tsi?

Video: Postmating isolation yog dab tsi?
Video: The Ultimate Prep During Self Isolation (Kyle's Cow Update) | PKA 2024, Kaum ib hlis
Anonim

POSTMATING ISOLATION . Postmating cais tiv thaiv kev ua tiav fertilization thiab. kev loj hlob, txawm tias mating yuav tshwm sim. Piv txwv li, tej yam kev mob nyob rau hauv lub cev xeeb tub ntawm ib tug poj niam yuav tsis txhawb.

Yog li ntawd, dab tsi yog lub ntsiab lus ntawm kev yug me nyuam cais?

Kev rho menyuam tawm hais txog qhov xwm txheej uas ntau hom tsiaj nyob hauv tib cheeb tsam, tab sis cov khoom ntawm tib neeg tiv thaiv lawv los ntawm kev sib tshuam. Tej yam uas txwv cov tsiaj los yog pab pawg ntawm cov kab mob uas tsim kev sib deev yog hu ua kev cais tawm.

Tsis tas li ntawd, Postmating isolating mechanism yog dab tsi? Postmating cais mechanism yog ib qho qauv, kev ua haujlwm ntawm lub cev, lossis kev loj hlob txawv txav uas tiv thaiv kab mob ntawm ob haiv neeg sib txawv, ib zaug mating tau tshwm sim, los ntawm kev tsim cov xeeb ntxwv zoo, fertile.

Yog li ntawd, dab tsi yog ib qho piv txwv ntawm kev rho menyuam tawm?

Ib txhia piv txwv ntawm pre-zygotic teeb meem muaj xws li lub cev 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 . Nrog lub cev muab cais nyob ib leeg , ob hom tsis tuaj yeem sib cuag nrog ib leeg vim tias lawv tsis ua haujlwm tib lub sijhawm, lossis lawv muaj lub sijhawm sib txawv.

Dab tsi yog 3 hom kev sib cais mechanisms?

Cov txheej txheem no suav nrog physiological lossis systemic teeb meem rau fertilization

  • Kev cais ib ntus lossis chaw nyob.
  • Kev cais tus cwj pwm.
  • Mechanical cais.
  • Gametic cais.
  • Zygote tuag thiab tsis muaj kev vam meej ntawm hybrids.
  • Hybrid sterility.
  • Pre-copulatory mechanisms nyob rau hauv cov tsiaj.

Pom zoo: