Monga maselo atsopano anapanga kudzera mitosis: mbali ndi phindu ndondomeko

Mfundo imodzi ya wotchuka chiphunzitso foni ya kapangidwe ka mawu za maonekedwe a maselo atsopano ku gwero lake, mwachitsanzo kholo. Koma angayambe m'njira ziwiri. Mmodzi wa iwo ndi mitosis. Iye ndi yofunika kuti ndondomeko ya kubereka ya mtundu wawo. Zomwe maselo anapanga kudzera mitosis, kodi chiwerengero chawo ndi makhalidwe a ndondomeko - zonsezi tikambirana mwatsatanetsatane m'nkhani ino.

selo mkombero

Selo la chamoyo chilichonse angathe alipo mu kusiyana awiri kuphwanya kapena kuyambira chiyambi cha ndondomeko ku nthawi ya imfa. Sitepe nthawi ndi kayendedwe ka maselo. Iwo limapangidwa mapazi a kugawa ndondomeko ndi zina nthawi imeneyi pakati pawo, wotchedwa interphase. Mu nthawi imeneyi kukula selo ndi mapangidwe zakudya.

Koma chimodzi mwa zinthu zofunika kwambiri ndi ndondomeko ya anawaonjezera kuwirikiza kawiri DNA macromolecules. Pali encrypted zinthu zonse majini a khungu.

Kodi selo magawano

Ndi meiosis kuchulukitsa umuna ndi linagwira. Akamanena za ndondomekoyi ndi mapangidwe gametes anayi haploid ku selo mayi ndi akonzedwa awiri DNA. Pachifukwa chimenechi amatchedwa meiosis. Izi ndi zofunika kwambiri chifukwa pa umuna kwa maselo kugonana, thupi latsopano, munali mfundo theka majini kwa mayi ndi bambo. Ndipo zimenezi zimatheka pansi chikhalidwe kuti gametes ndi haploid.

Zomwe maselo anapanga kudzera mitosis? Yankho losavuta ndi diploid, ndiye ndi awiri akonzedwa kuti asakhale ndi vutoli. Zimenezi n'kofunika. Chinthu ndi chifukwa cha mitosis opangidwa maselo ali ndi buku lenileni la kholo la. Iwo onse somatic.

Magawo mitosis

The ndondomeko ya kupanga latsopano somatic selo zikuphatikizapo magawo angapo. kutalika chonse, malingana ndi mtundu wa chamoyo zimasiyanasiyana mphindi zochepa maola angapo.

Siteji koyamba amatchedwa prophase. Pa nthawi iyi pali ulusi chromatin compaction, kuchepetsa nucleoli, mitotic spindle mapangidwe. pachimake chipolopolo limaphwasuka kusandulika chifukwa DNA kugwera cytoplasm lapansi.

Gawo lachiwiri amatchedwa metaphase. Kwenikweni umenewu chagona pa ntchito yomanga DNA mu ndege chomwecho ndi kuika iwo ulusi spindle. Pamakhala anaphase, ndilo kwambiri sakhalitsa gawo. Chifukwa cha mitosis opangidwa athanzi maselo mwana wamkazi. Zimenezi itha sitepe telophase. Pa khromozomu chomwecho dispiralized. Pafupifupi zosaoneka pansi pa maso kuwala. Kenako, za chromatids amayamba pachimake chipolopolo ndi kugawa spindle Mwamsanga pang'onopang'ono.

Kodi maselo ambiri popangidwa ndi mitosis

Mitosis monga njira ya kugawikana maselo eukaryotic ndi ofala kwambiri m'chilengedwe. Ayambe anamwalira kapena kuonongeka ziwalo ndi ndendende chifukwa cha ndondomekoyi. Chifukwa maselo mitosis awiri mwana anapanga kwa kholo limodzi. Pa nthawi yomweyo, chifukwa anawaonjezera kuwirikiza kawiri pa mamolekyulu DNA mu interphase wa mkombero selo, udakalipo diploid khromozomu akonzedwa.

Mitosis - maziko a mitundu yonse asexual kubalana: vegetative - zomera, magawano selo pawiri - losavuta, Mipikisano kugawanika - ndi tiziromboti malungo, spore - bowa ndi Mumapezekanso, ikuphukira - coelenterates.

Tanthauzo zamoyo mitosis

maselo anapanga kudzera mitosis ndi khromozomu yomweyo ngati kholo la. Chifukwa cha ndondomeko anasamutsa mudziwe chibadwa, ziribe kanthu magawano angati mpaka kalekale aliyense ikuchitika. Pa ndondomekoyi sanasiye ndi topangira DNA, ndi ndondomeko ya nucleotides mu mamolekyulu DNA.

Choncho, chifukwa cha mitosis ku selo imodzi anapanga mwana wamkazi awiri amene kwathunthu motsanzira wapachiyambi. Izi zipangitsa mtendere wa karyotypes ndi chofunika kuti kuli zamoyo zonse mu nthawi ya chitukuko munthu ndi mbiri yakale.