Video: Tus naj npawb ntawm chromosomes hauv tus ntxhais cell piv li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yuav ua li cas cov ntxhais cell sib piv rau niam txiv cell ? Npaj rau mitosis, a cell tsim ib daim qauv ntawm nws cov DNA. Thaum lub sij hawm mitosis, DNA coils rau hauv condensed chromatid khub hu ua chromosomes . Homologous khub tau sib cais, thiab ob qhov tshwm sim cov ntxhais muaj ib nrab li ntau chromosome rau cell.
Tom qab ntawd, pes tsawg tus chromosomes hauv tus ntxhais cell piv rau niam txiv cell li cas?
Mitosis tsim ob qho tib si cov ntxhais uas txhua tus muaj tib yam tus naj npawb ntawm chromosomes raws li lawv niam txiv cell . Hauv qhov sib piv, meiosis ua rau muaj plaub qhov tshwj xeeb cov ntxhais , txhua tus uas muaj ib nrab tus naj npawb ntawm chromosomes raws li cov niam txiv cell.
Tsis tas li ntawd, puas yog chromosomes hauv cov ntxhais cell genetic zoo tib yam? Thaum kawg ntawm txoj kev faib, duplicated chromosomes muab faib sib npaug ntawm ob hlwb . Cov no cov ntxhais yog genetic zoo tib yam diploid hlwb uas muaj tib chromosome tus lej thiab chromosome hom. Somatic hlwb yog cov piv txwv ntawm hlwb uas faib los ntawm mitosis.
Ib yam li ntawd, nws tau nug, pes tsawg tus chromosomes hauv txhua tus ntxhais cell?
Txhua tus ntxhais cell yuav muaj 30 chromosomes . Thaum kawg ntawm meiosis II, ib lub cell (ie, gamete) yuav muaj ib nrab ntawm thawj tus naj npawb ntawm chromosomes yog,15 chromosomes.
Muaj pes tsawg chromosomes nyob rau hauv tus ntxhais cell yog tias tus naj npawb haploid yog 23?
ib ntawm ib khub. Cov tus naj npawb ntawm chromosomes raug txo los ntawm 46 ( 23 khub) rau 23 thaum lub sijhawm ua haujlwm ntawm meiosis. Vim lawv tsuas muaj ib nrab xwb chromosomes nyob rau hauv ib tug somatic cell , lawv termed haploid (n).
Pom zoo:
Dab tsi yog tus naj npawb ntawm chromosomes rau haploid pea cog hlwb?
Kawm nyuaj Txhais txhais Diploid 2 pawg ntawm chromosomes pes tsawg tus chromosomes rau diploid tib neeg hlwb? 46 Tus naj npawb ntawm chromosomes rau haploid pea cog hlwb yog dab tsi? 7 Tus naj npawb ntawm chromosomes rau diploid orangutan hlwb yog dab tsi? 48 Tus lej ntawm cov hlwb rau Diploid dev hlwb yog dab tsi? 78
Dab tsi yog tus naj npawb ntawm subatomic hais hauv atom ntawm B11?
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Dab tsi yog tus naj npawb ntawm chromosomes hauv lub cell haploid?
Lub haploid cell uas muaj tus lej haploid, uas yog tus naj npawb ntawm chromosomes pom nyob rau hauv lub nucleus uas tsim ib txheej. Hauv tib neeg, cov hlwb haploid muaj 23 chromosomes, piv rau 46 hauv cov hlwb diploid. Muaj qhov sib txawv ntawm cov hlwb haploid thiab monoploid