Sezvo masero matsva kuumbwa kuburikidza mitosis: zvinhu uye muitiro ukoshi

Mumwe pfungwa yakakurumbira musero dzidziso sechivako mashoko pamusoro nechitarisiko masero matsva kubva kupi, kureva mubereki. Asi unogona kuitika nenzira mbiri. Mumwe wavo mitosis. Iye kunokosha kuti muitiro wokuberekana yavo mhando. Izvo masero vari kuumbwa kuburikidza mitosis, chii kwavo nhamba uye maitiro acho - ichi zvose ichakurukurwa zvakadzama munyaya ino.

sero kutenderera

Sero chipi muviri inokwanisa zviripo pakakoromoka pakati maviri ayo Kupwanywa kana kubvira pakutanga kwacho kusvikira nguva rufu. Danho iri nguva uye muchitokisi yatinofema. It unotora matanho kuparadzanise kwacho uye vamwe nguva penguva pakati pavo, unonzi interphase. In nguva ino muchitokisi kukura uye paumbwe muviri.

Asi chimwe chinonyanya kukosha ndechokuti muitiro doubling DNA macromolecules. Pane ari encrypted zvose majini mashoko muchitokisi yacho.

Sei Sero nokupesana

With meiosis vawande dzisingaoneki uye ovum. Musimboti izvi ndiko paumbwe mana haploid gametes kubva mai muchitokisi miviri vanochengeta okutodza. Nokuda kwechikonzero ichi chinonzi meiosis. Izvi zvinokosha zvikuru nokuti panguva pakusangana dzepabonde mumasero, muviri mutsva, ine hafu masero mashoko kubva mai nababa. Uye zvinokwanisika chete pasi ezvinhu kuti gametes vari haploid.

Izvo masero vari kuumbwa kuburikidza mitosis? Mhinduro iri nyore diploid, ndiko kuti, aine miviri chromosome yakatarwa. Izvi kunokoshawo. The ndechokuti somugumisiro mitosis anogadzirwa masero kuti vari chaiyo kopi mubereki. Vose somatic.

Maitikiro ose mitosis

Muitiro rokuumba itsva muchitokisi somatic kunosanganisira maitikiro akawanda. kunopindirana kureba ravo, zvichienderana mhando muviri zvichisiyana kwemaminitsi mashomanana kuti akawanda maawa.

The kwokutanga Danho unonzi prophase. Panguva ino pane norwonzi chromatin compaction, zvinoderedza pamusoro nucleoli, mitotic chokurukisa inotungamirwa. Musimboti goko unoora wakakodzera okutodza kuwira cytoplasm.

Danho rechipiri anonzi metaphase. Chaizvoizvo Its iri pakuvaka okutodza mune imwe ndege uye achabatanidza navo chokurukisa shinda. Izvi zvinoteverwa anaphase, inova pfupi zvikuru danho. Somugumisiro mitosis anogadzirwa zvakazara kuumbwa mwanasikana masero. Izvi kunoguma padanho telophase. Panguva chromosome dispiralized. Ivo zvinenge zvisiri kuonekwa pasi chiedza maikorosikopu. Next, pamusoro chromatids anotanga kuumbika makirisito goko uye kugovera chokurukisa haarambi zvishoma nezvishoma.

Vangani masero inoumbwa mitosis

Mitosis sezvo nzira weboka masero eukaryotic ndicho zvakasikwa. Kuzoita vakarasika kana kukuvaradzwa nhengo dzomuviri chaizvo nokuda kwacho. Somugumisiro mwanasikana masero mitosis vaviri aumba kubva mubereki mumwe chete. Panguva iyoyowo, nokuda doubling DNA mamorekuru iri interphase sero kutenderera, kuchine diploid chromosome yakatarwa.

Mitosis - hwaro marudzi ose asexual kubereka: vegetative - mune miti, sero nokupesana migove miviri - nyore, multi-kutsemura - the marariya chisvetasimba, spore - notumwe uye ferns, yotunga - coelenterates.

The zvipenyu kukosha mitosis

Masero vari kuumbwa kuburikidza mitosis pamwe chete mashoko okutodza kuisa sezvo mubereki. Somugumisiro muitiro tama kuvabereki mashoko, hazvinei zvechigarire nokupesana vangani chero kuitwa. Panguva iyi yakaramba kugara uye uwandu okutodza, uye kutevedzana kwezviitiko nucleotides mu DNA mamorekuru.

Saka, somugumisiro mitosis kubva sero rimwe chete vakaumba mwanasikana vaviri zvakazara kutevedzera chepakutanga. Izvi zvinoita kutsiga karyotypes uye chinhu chinodiwa kuti kuvapo zvose zvipenyu panyika nguva yavo pachake uye nhoroondo kukura.