Video: Vim li cas niam txiv thiab tus ntxhais hlwb hauv mitosis thiab meiosis txawv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Piav: Qhov sib txawv tseem ceeb ntawm mitosis thiab meiosis tshwm sim hauv meiosis theem I. In mob mitosis , cov cov ntxhais muaj tib tus naj npawb ntawm chromosomes li cov niam txiv cell , thaum nyob hauv meiosis , cov cov ntxhais muaj ib nrab ntawm cov chromosomes li cov niam txiv.
Tsis tas li ntawd, cov menyuam ntxhais sib txawv li cas ntawm niam txiv cov hlwb hauv mitosis?
Nyob rau hauv cov nqe lus ntawm DNA cov ntsiab lus, los yog tus nqi ntawm DNA, lub cov ntxhais zoo tib yam rau cov niam txiv . Hauv cov kab mob, mob mitosis yog ib txoj kev los tsim ob cov ntxhais uas yuav muaj txawv functions los yog ua txawv cell hom. Nyob rau hauv ob qho tib si, lub cov ntxhais tseem muaj cov DNA tib yam li cov niam txiv cell.
Tsis tas li ntawd, cov ntxhais cell txawv li cas ntawm cov qub cell? Txhua ntxhais cell yog haploid thiab tsuas muaj ib pawg ntawm chromosomes, lossis ib nrab ntawm tag nrho cov chromosomes ntawm qub cell . Cytokinesis ua raws li, faib cov cytoplasm ntawm ob hlwb . Thaum xaus ntawm meiosis, muaj plaub haploid cov ntxhais uas mus txuas ntxiv mus rau hauv cov phev los yog qe hlwb.
Tsis tas li ntawd, vim li cas cov ntxhais cov hlwb sib txawv hauv meiosis?
Cov cov ntxhais tsim los ntawm mob mitosis yog zoo tib yam, hos cov cov ntxhais tsim los ntawm meiosis yog txawv vim kev hla dhau tau tshwm sim. Cov xwm txheej uas tshwm sim hauv meiosis tab sis tsis yog mob mitosis suav nrog homologous chromosomes ua ke, hla dhau, thiab nyob rau hauv raws li cov phaj metaphase hauv tetrads.
Dab tsi yog qhov txawv ntawm cov menyuam ntxhais hauv mitosis thiab meiosis?
Ob cov ntxhais yog tsim tom qab mob mitosis thiab cytoplasmic division, thaum plaub cov ntxhais yog tsim tom qab meiosis . Cov ntxhais tshwm sim los ntawm mob mitosis yog diploid, thaum cov uas tshwm sim los ntawm meiosis ua haploid. Cov ntxhais uas yog cov khoom ntawm mitosis yog genetic zoo tib yam.
Pom zoo:
Dab tsi yog niam txiv cell hauv meiosis?
Meiosis yog ib hom kev faib ntawm tes uas txo cov chromosomes hauv niam txiv cell los ntawm ib nrab thiab tsim plaub gamete hlwb. Cov txheej txheem ua rau plaub tus ntxhais lub hlwb uas yog haploid, uas txhais tau hais tias lawv muaj ib nrab ntawm cov chromosomes ntawm diploid niam txiv cell
Cov txiv neej thiab poj niam muaj pes tsawg tus X thiab Y chromosomes?
Cov poj niam muaj ob daim qauv ntawm X chromosome, thaum txiv neej muaj ib qho X thiab ib qho Y chromosome. 22 autosomes yog suav nrog qhov loj me. Lwm ob chromosomes, X thiab Y, yog kev sib deev chromosomes. Daim duab no ntawm tib neeg chromosomes lined ua khub yog hu ua karyotype
Muaj pes tsawg tus ntxhais cov hlwb ua mitosis thiab meiosis tsim?
Cells faib thiab tsim nyob rau hauv ob txoj kev, mitosis thiab meiosis. Mitosis ua rau ob lub hlwb zoo tib yam, thaum meiosis tshwm sim hauv plaub lub hlwb. Hauv qab no peb qhia txog qhov sib txawv ntawm cov yuam sij thiab qhov zoo sib xws ntawm ob hom kev faib ntawm tes
Dab tsi yog tus lej chromosome ntawm niam txiv lub hlwb hauv mitosis?
Tom qab mitosis ob lub hlwb zoo tib yam tsim nrog tib tus naj npawb ntawm chromosomes, 46. Haploid hlwb uas tsim los ntawm meiosis, xws li qe thiab phev, tsuas muaj 23 chromosomes, vim hais tias, nco ntsoov, meiosis yog 'txo faib.'
Puas yog cov menyuam ntxhais zoo ib yam rau niam txiv cell hauv meiosis?
Cov txheej txheem ua rau plaub tus ntxhais lub hlwb uas yog haploid, uas txhais tau hais tias lawv muaj ib nrab ntawm cov chromosomes ntawm diploid niam txiv cell. Meiosis muaj ob qho tib si zoo sib xws thiab qhov sib txawv ntawm mitosis, uas yog cov txheej txheem ntawm tes faib ua niam txiv cell tsim ob lub hlwb zoo tib yam