Mibvunzo yeMienzaniso neKukurukurirana kweChikamu cheSero
Kupatsanurwa kwemasero inzira huru inoitika mumarudzi ese ehupenyu, zvichiita kuti kukura, kukura, uye kugadziriswa kwenyama. Padanho remasero, kupatsanurwa uku kwakakamurwa kuita mhando mbiri huru: mitosis ne meiosis. Mitosis ndiyo inokonzera kukura kwemasero nekuchengetedza, nepo meiosis ichiita basa mukugadzirwa kwema gametes ekubereka pabonde. Kunzwisisa kwakakwana kwekupatsanurwa kwemasero kwakakosha kune vadzidzi vebiology nekuti ndiyo hwaro hwemamwe maitiro mazhinji ehupenyu. Muchinyorwa chino, tichaongorora mienzaniso yakati wandei yezvinetso zvekukurukura nezvekupatsanurwa kwemasero kuti tiwedzere kunzwisisa kwedu zvinhu izvi.
Kunzwisisa Chikamu Chemasero
Tisati tatanga nemibvunzo, ngationgororei tsananguro yekupatsanurwa kwemasero. Masero ndiwo mayuniti madiki ezvisikwa zvipenyu zvinokwanisa kuita mabasa ehupenyu. Kupatsanurwa kwemasero inzira iyo sero rinopatsanurwa kuti rigadzire masero maviri kana kupfuura emwanasikana. Mu mitosis, sero remubereki mumwe chete rinogadzira masero maviri emwanasikana akafanana nemajini. Kusiyana neizvi, mu meiosis, sero remubereki mumwe chete rinopatsanurwa kuita masero mana emwanasikana ane kusiyana kukuru kwemajini.
Maitiro eMitosis
Mitosis ine matanho akati wandei: prophase, metaphase, anaphase, uye telophase, ichiteverwa ne cytokinesis. Iyi ndiyo nzira iyo nucleus yesero inopatsanurana kuita ma nuclei maviri akafanana, pakupedzisira ichiparadzanisa sero rese.
Prophase: Chromatin inoungana kuita machromosome, uye spindle fibers inotanga kuumbwa. Nucleolus inonyangarika.
Metaphase: Machromosome anotevedzana achitevedza equator yesero, inonzi metaphase plate.
Anaphase: Masisita echromatids anodhonzwa kuenda kumatanda akatarisana nesero ne microtubules.
Telophase: Kamudzira kenyukireya kanotanga kuchinja-chinja kachitenderedza ma chromosome maviri akasiyana, ma chromosome anotanga kusashanda zvakanaka, ogadzira chromatin zvakare.
Cytokinesis: Kupatsanurwa kwe cytoplasm, umo sero rinopatsanurwa kuita masero maviri emwanasikana.
Maitiro eMeiosis
Meiosis inzira yakaoma yekuparadzanisa inosanganisira kupatsanurana kwenyukireya kuviri (meiosis I nemeiosis II) zvichikonzera masero mana emwanasikana, rimwe nerimwe riine hafu yehuwandu hwemachromosomes esero remubereki. Izvi zvakakosha pakuumbwa kwemagametes (sperm neova).
Meiosis I:
– Prophase I: Machromosomes akafanana anobatana uye anochinjana majini kuburikidza nenzira inonzi cross-over.
– Metaphase I: Maviri emachromosome akafanana anowirirana paplate ye equator.
– Anaphase I: Machromosomes akafanana anodhonzwa kumatanda akatarisana esero.
– Telophase I neCytokinesis: Masero maviri e haploid anoumbwa, rimwe nerimwe riine hafu yehuwandu hwema chromosomes.
Meiosis II:
– Zvinoita sezvakaita mitosis apo sero rega rega re haploid rinopatsanurana zvakare.
- Zvinokonzera masero mana akasiyana e haploid.
Mibvunzo Yekukurukurirana Yemuenzaniso
Pazasi pane mimwe mienzaniso yemibvunzo yatichakurukura kuti tibatsire kusimbisa pfungwa yekupatsanurwa kwemasero.
Mubvunzo 1: Tsanangura musiyano mukuru uripo pakati pemitosis nemeiosis.
Kukurukurirana: Mitosis inzira yekupatsanura masero inogadzira masero maviri akafanana, rimwe nerimwe riine nhamba ye diploid yema chromosomes. Izvi zvakakosha pakukura nekugadzirisa masero emuviri. Kusiyana neizvi, meiosis inogadzira masero mana akasiyana emwanasikana ane hafu yenhamba yema chromosomes emasero emubereki (haploid), akakosha pakugadzirwa kwe gamete.
Mubvunzo 2: Sero re diploid rine ma chromosomes makumi mana nematanhatu rinopinda muchikamu chimwe chete che meiosis. Sero rega rega remwanasikana richava nema chromosomes mangani?
Kukurukurirana: Mushure me meiosis, sero rega rega remwanasikana rine hafu yenhamba yema chromosomes sesero remubereki. Kana sero remubereki re diploid riine ma chromosomes makumi mana nematanhatu, saka sero rega rega remwanasikana richava nema chromosomes makumi maviri nematatu.
Mubvunzo 3: Muchikamu chipi chinopatsanurwa ma chromatids emukoma nemusikana mu mitosis, uye izvi zvakasiyana sei mu meiosis?
Kukurukurirana: Mu mitosis, ma chromatids echikadzi anoparadzana panguva ye anaphase. Mu meiosis, kupatsanurwa kwe chromatids echikadzi kunoitika panguva ye anaphase II. Munguva ye anaphase I ye meiosis, ma chromosomes echikadzi anoparadzana, kwete ma chromatids echikadzi.
Mubvunzo 4: Chii chinorehwa nekuyambuka uye panguva ipi yemeiosis chiitiko ichi chinoitika?
Kukurukurirana: Kuyambuka-kupfuura kuchinjana kwezvikamu zvemajini pakati pemachromosome akafanana kunoitika panguva yeprophase I ye meiosis. Maitiro aya akakosha pakuwedzera kusiyana kwemajini pakati pemagametes anobuda.
Mubvunzo 5: Kana sero rembeu riine machromosome masere, makromosomu mangani ari musero remuviri rechinhu chimwe chete?
Kukurukurirana: Masero embeu ari haploid, zvichireva kuti ane hafu yenhamba yemachromosomes semasero emuviri ari kutaurwa nezvawo. Kunyange zvazvo masero embeu aine machromosomes masere, masero emuviri (ari diploid) achava nemachromosomes gumi nematanhatu.
Mhedziso
Kunzwisisa kupatsanurwa kwemasero, mitosis ne meiosis, kwakakosha pakuziva pfungwa huru mu biology. Kuziva zvinhu izvi kunogona kuwedzerwa kuburikidza nekukurukurirana, kudzidza madhayagiramu uye kutenderera kwekupatsanurwa kwemasero, uye kushanda kuburikidza nematambudziko akasiyana-siyana emuenzaniso. Nekudzidza kwakanangana uye kudzidzira nguva dzose, kuoma kwemaitiro ekupatsanurwa kwemasero kunogona kutsanangurwa zviri nani uye kunzwisiswa. Tinovimba kuti matambudziko emuenzaniso nekukurukurirana muchinyorwa chino zvichabatsira mukudzidza kwako kwekupatsanurwa kwemasero.
