Video: Dab tsi tshwm sim thaum lub sij hawm fertilization biology?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Fertilization , duab nyob rau hauv Daim duab 1a yog txheej txheem nyob rau hauv uas gametes (qe thiab phev) fuse los ua zygote. Lub qe thiab cov phev txhua muaj ib txheej ntawm chromosomes. Cov kab mob nuclear ntawm lub qe thiab cov phev tawg thiab ob lub haploid genomes tau sib sau ua ke los ua diploid genome.
Ib yam li ntawd, nws tau nug, ua li cas thaum lub sijhawm fertilization?
Tib neeg fertilization yog kev sib koom ua ke ntawm tib neeg lub qe thiab phev, feem ntau tshwm sim hauv ampulla ntawm lub raj xa menyuam. Qhov tshwm sim ntawm kev sib koom tes no yog tsim cov zygote cell, lossis chiv qe, pib ua ntej kev loj hlob. Cov txheej txheem ntawm fertilization koom nrog phev fusing nrog ovum.
Ib sab saum toj no, 6 kauj ruam ntawm kev ua chiv yog dab tsi? Hauv cov ntsiab lus, fertilization tuaj yeem piav qhia raws li cov hauv qab no:
- Phev Capacitation.
- Phev-Zona Pellucida Binding.
- Cov tshuaj tiv thaiv Acrosome.
- Kev nkag mus ntawm Zona Pellucida.
- Sperm-Oocyte Binding.
- Qe Qhib thiab Cortical Reaction.
- Zona Reaction.
- Txheej Txheem Tom Qab fertilization.
Kuj nug, 4 cov kauj ruam ntawm fertilization yog dab tsi?
Cov theem ntawm fertilization tuaj yeem muab faib ua plaub txheej txheem: 1) kev npaj phev, 2) phev-qe paub thiab khi, 3) phev-qe fusion thiab 4 ) fusion ntawm phev thiab qe pronuclei thiab ua kom zygote.
Yuav ua li cas fertilization tshwm sim?
Fertilization tshwm sim hauv cov hlab ntaws, uas txuas cov zes qe menyuam mus rau lub tsev menyuam. Fertilization tshwm sim thaum cov phev cell ua tau zoo ntsib lub qe qe hauv lub raj xa menyuam. Ib zaug fertilization yuav qhov chaw, qhov tshiab chiv cell hu ua zygote.
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