Zomwe zimagwira ntchito ya gamete
Selo la kugonana, poyerekeza ndi mwachizolowezi, somatic, ali ndi kusiyana kwakukulu. Chofunika kwambiri pazimenezi ndi ma haproid a ma chromosomes, omwe ali mwachindunji m'maganizo a maselo a kugonana okha. Izi zimatsimikizira kubereka mu zygote za mtundu wa diplomadi wokhazikika wa ma chromosomes kwa zamoyo, mwachitsanzo, theka la amayi, theka la atate.
Komanso magemetes amasiyana ndi maselo ena ndi mgwirizano wodabwitsa pakati pa mtima ndi cytoplasm. Komanso, mu spermatozoa ndipamwamba kuposa ma oocyte. Izi makamaka chifukwa chakuti mu spermatozoa kuchuluka kwa cytoplasm ndi kochepa, poyerekeza ndi ovule, yomwe ili ndi chiwerengero chachikulu cha michere yomwe imakhala ndi chithandizo cha feteleza.
Kuonjezera apo, mosiyana ndi maselo osokoneza bongo, maselo a kugonana amadziwika ndi njira yochepa yamagetsi.
Kodi ntchito za maselo amuna ndi ziti?
Chofunika ndi, mwina, ntchito yokha ya spermatozoa, ndi yobereka. Umuna, kuphatikiza ndi dzira, uwawonetseni ndi maselo awo a haploid, omwe ndi ofunikira kukula kwa mimba.
Kodi ntchito za maselo ogonana ndi abambo ndi ziti?
Poyerekeza ndi selo lachiwerewere lachigololo, lomwe ntchito zake zimangokhala ndi feteleza ndi dothi, maselo aubereki amawathandiza kwambiri.
Kotero, ndi dzira limene limapatsa mwanayo feteleza zakudya zam'tsogolo, pogwiritsa ntchito trophic function, kuphatikizapo, chipolopolo cha dzira lisanakhazikitsidwe zygote zimapanganso chitetezo.