Qhov sib txawv tseem ceeb ntawm sab nraud thiab sab hauv fertilization yog tias kev sib koom ua ke ntawm txiv neej thiab poj niam gametes nyob rau hauv fertilization sab nraud tshwm sim sab nraud poj niam lub cev thaum lub union ntawm txiv neej thiab poj niam gametes nyob rau hauv fertilization tshwm sim nyob rau hauv poj niam lub cev.
Fertilization yog qhov xwm txheej tseem ceeb tshaj plaws uas tshwm sim hauv kev sib deev. Hauv lwm lo lus, nws yog cov txheej txheem tseem ceeb uas tsim cov xeeb ntxwv los ntawm ob niam txiv. Ob hom gametes; txiv neej gamete thiab poj niam gamete sib sau ua ke thaum lub sij hawm fertilization. Yog li ntawd, fertilization tuaj yeem pom tsuas yog hauv kev sib deev. Gametes yog haploid, thiab thaum lawv sib txuas nrog ib leeg, nws tsim ib lub cell diploid hu ua zygote. Tom qab ntawd, mitosis faib cov zygote thiab tsim mus rau ib tus neeg tshiab. Ntawm no, muaj ob hom fertilization raws li txoj kev uas lawv tshwm sim. Lawv yog cov sab nraud fertilization thiab internal fertilization. External fertilization, raws li lub npe implies, tshwm sim sab nraum tus poj niam lub cev thaum lub internal fertilization tshwm sim nyob rau hauv tus poj niam lub cev.
Kev Fertilization Sab Nraud yog dab tsi?
Kev fertilization sab nraud yog ib hom kev fertilization uas fusion txiv neej thiab poj niam gametes tshwm sim sab nraud ntawm poj niam lub cev. Yog li ntawd, fertilization sab nraud xav tau dej los pab txhawb lawv fertilization. Yog li ntawd, fertilization sab nraud feem ntau tshwm sim nyob rau hauv qhov chaw ntub dej. Tsis zoo li cov fertilization sab hauv, ob leeg, txiv neej thiab poj niam gametes tso rau hauv ib puag ncig, tshwj xeeb tshaj yog rau cov dej, kom txiv neej gametes tuaj yeem ua luam dej ntawm cov poj niam gametes rau syngamy. Yog li ntawd, cov kab mob uas qhia lwm yam fertilization yuav tsum nyob rau hauv dej los yog lawv yuav tsum mus rau watery ib puag ncig rau kev yug me nyuam. Qhov tshwj xeeb ntawm cov txiv neej gametes yog tias lawv yog motile.
Daim duab 01: Kev Tso Tawm Sab Nraud - Qe tso rau hauv dej
Tsis tas li ntawd, hom fertilization no feem ntau tshwm sim hauv cov nroj tsuag qis. Tsis tas li ntawd, qee cov tsiaj xws li amphibians thiab ntses qhia txog kev fertilization sab nraud. Txawm li cas los xij, muaj qee qhov tsis zoo uas cuam tshuam nrog kev yug me nyuam sab nraud xws li qhov yuav tsum tau tso tawm ntau tus gametes, muaj qhov muaj sia nyob tsawg ntawm lub embryo, tsis muaj kev saib xyuas niam txiv, thiab lwm yam.
Kev Fertilization Internal yog dab tsi?
Internal fertilization yog hom thib ob ntawm fertilization uas tshwm sim hauv poj niam lub cev. Thaum lub sij hawm fertilization, txiv neej kab mob tso nws gametes nyob rau hauv cov poj niam kab mob. Yog li ntawd, kev sib koom ua ke ntawm txiv neej thiab poj niam gametes tshwm sim hauv poj niam lub cev. Thaum fertilization tiav, lub zygote tsim nyob rau hauv cov poj niam kab mob mus txog rau thaum yug ntawm cov xeeb leej xeeb ntxwv. Li no, hom fertilization no tsuas yog tiv thaiv tus poj niam gamete.
Daim duab 02: Internal Fertilization
Tsis tas li ntawd, lub embryo tau txais kev tiv thaiv ntau dua los ntawm kev ua phem thiab ib puag ncig hnyav, yog li nws muaj kev ciaj sia ntau dua. Tsis tas li ntawd, tsis tas yuav tsim ntau tus poj niam gametes (qe) txij li thaum lawv nyob hauv lub cev poj niam. Ib yam li ntawd, muaj ntau yam zoo cuam tshuam nrog fertilization sab hauv ntawm sab nraud fertilization. Hom kev fertilization no muaj nyob rau hauv cov noog, cov tsiaj reptiles thiab mammals.
Dab tsi zoo sib xws ntawm Sab Nraud thiab Internal Fertilization?
- Kev fertilization sab nraud thiab sab hauv yog ob hom fertilization tshwm sim hauv kev sib deev.
- Nyob rau hauv ob hom, ib tug txiv neej thiab ib tug poj niam gamete fuse ib leeg.
- Tsis tas li, ob qho tib si ua rau diploid zygote.
- Tsis tas li ntawd, ob leeg tsim cov noob caj noob ces.
Qhov txawv ntawm Sab Nraud thiab Internal Fertilization yog dab tsi?
Kev fertilization sab nraud thiab sab hauv yog ob hom kev fertilization pom hauv kev sib deev. Qhov sib txawv loj ntawm sab nraud thiab sab hauv fertilization yog tias sab nraud fertilization tshwm sim sab nraum tus poj niam lub cev thaum lub sij hawm fertilization tshwm sim hauv poj niam lub cev. Raws li qhov tshwm sim, yuav tsum muaj qhov nruab nrab sab nraud xws li dej rau sab nraud fertilization tshwm sim thaum nws tsis xav tau nyob rau hauv fertilization li nws tshwm sim hauv poj niam lub cev. Muaj ntau qhov sib txawv ntawm ob hom fertilization no.
Cov infographic hauv qab no qhia txog qhov tseeb ntxiv txog qhov sib txawv ntawm sab nraud thiab sab hauv fertilization.
Summary – Sab nraud vs Internal Fertilization
Raws li cov npe qhia, kev tsim tawm sab nraud tshwm sim sab nraud lub cev whereas, sab hauv fertilization tshwm sim hauv poj niam lub cev. Qhov no yog qhov sib txawv tseem ceeb ntawm sab nraud thiab sab hauv fertilization. Thaum lub sij hawm fertilization sab nraud, txiv neej thiab poj niam kab mob tso lawv gametes rau hauv ib puag ncig. Ntawm qhov tod tes, thaum lub sij hawm fertilization, txiv neej kab mob tso cov txiv neej gametes hauv cov poj niam kab mob. Yog li ntawd, lub union ntawm txiv neej thiab poj niam gametes tshwm sim nyob rau hauv lub cev poj niam, thiab cov tsim zygote matures nyob rau hauv lub niam kab mob. Txij li thaum fertilization sab hauv muaj kev txhawj xeeb txog kev tiv thaiv ntawm lub qe fertilized los yog lub embryo, nws tsis tsim nyog los tsim ib tug loj tus naj npawb ntawm cov poj niam gametes. Nws yog ib qho ntawm qhov zoo ntawm kev fertilization nyob rau hauv sab nraud fertilization. Tsis tas li ntawd, embryo tau txais kev saib xyuas ntawm niam txiv, thiab kev muaj sia nyob siab ntawm cov xeeb ntxwv yog qee qhov zoo ntawm kev fertilization sab hauv.
