Video: Yuav ua li cas yog ib yam dab tsi tsis ncaj ncees lawm thaum lub sij hawm mitosis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hloov pauv hauv Chromosome Number
Nondisjunction yog qhov tshwm sim ntawm kev ua tsis tiav ntawm chromosomes cais thaum lub sij hawm mitosis . Qhov no ua rau cov hlwb tshiab nrog cov chromosomes ntxiv lossis ploj lawm; ib qho mob hu ua aneuploidy. Rau cov me nyuam yug los nrog aneuploidy, mob caj dab hnyav tshwm sim.
Yog li ntawd, yuav ua li cas tshwm sim thaum ib yam dab tsi tsis ncaj ncees lawm thaum lub sij hawm meiosis?
yuam kev thaum meiosis tuaj yeem coj rau kev hloov pauv hauv gametes. Cov gametes tsis zoo uas dhau los ua fertilization tuaj yeem ua rau nchuav menyuam lossis thaum kawg ua rau rau kab mob caj ces. Qhov feem ntau yuav yuam kev tshwm sim thaum meiosis yog chromosomal non-disjunction, uas ua rau yuam kev tus naj npawb ntawm chromosomes nyob rau hauv ib tug poj niam cev xeeb tub.
Ib yam li ntawd, yuav ua li cas thaum cov kev tswj uas ua kom mitosis hauv kev kuaj tsis ua tiav? Lub hom phiaj ntawm mob mitosis yog los tsim ob tug ntxhais cell uas yog duplicates ntawm niam cell. Yog tias qhov system " kuaj thiab tshuav " ua tsis tiav rau tswj lub voj voog ntawm tes, lub xov tooj ntawm tes yuav pib faib tsis tau. Cov qog nqaij hlav cancer tsis teb rau cov cim qhia uas tswj kev loj hlob ntawm cov hlwb.
Ib yam li ib tug yuav nug, yuav ua li cas thaum mitosis tsis tswj tau?
Yog hais tias lub cell division yog uncotrolled, txhais tau tias mob mitosis tau tsis tu ncua tswj tsis tau , qhov qub cell faib tau dhau los ua qog nqaij hlav cancer. Qee zaum, cov qog nqaij hlav cancer no tau txais lub peev xwm nkag mus rau hauv cov hlab ntsha phab ntsa thiab ncig hauv cov hlab ntshav thiab mus txog lwm qhov chaw hauv lub cev thiab kis cov qog.
Down syndrome tshwm sim theem twg?
Down syndrome tshwm sim thaum lub nondisjunction tshwm sim nrog Chromosome 21. Meiosis yog ib hom kev faib cell tshwj xeeb siv los tsim peb cov phev thiab qe qe.
Pom zoo:
Txoj kab ncaj nraim ntawm lub sij hawm ncua sij hawm txhais li cas?
Distance - Sijhawm Graphs. 'Txoj kab ncaj nraim' ntawm lub sijhawm ncua sij hawm qhia peb tias cov khoom mus ncig ntawm qhov ceev tsis tu ncua. Nco ntsoov tias koj tuaj yeem xav txog qhov khoom nyob ruaj ruaj (tsis txav) raws li kev mus los ntawm qhov ceev ntawm 0 m / s
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Yuav ua li cas mus tsis ncaj ncees lawm nrog hla?
1 Teb. Yog tias kev hla tsis tau tshwm sim thaum lub sij hawm meiosis, yuav muaj tsawg dua kev hloov ntawm caj ces hauv ib hom. Tsis tas li ntawd, cov tsiaj tuaj yeem tuag vim muaj kab mob thiab txhua yam kev tiv thaiv tau txais yuav tuag nrog tus neeg
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