Hauv Selaginella, txo kev faib (meiosis) tshwm sim ob qho tib si hauv microspore niam cell thiab megaspore niam cell, uas tsim haploid microspores thiab megaspores, raws li.
Puas txo kev faib tshwm sim hauv mitosis?
Mitosis tsim 2 lub hlwb diploid. Lub npe qub rau meiosis yog txo / faib. Meiosis I txo qis ploidy theem ntawm 2n rau n (txo) thaum Meiosis II faib cov seem ntawm chromosomes hauv cov txheej txheem mitosis zoo li (kev faib tawm).
Puas meiosis puas muaj qhov txo qis?
Yuav ua li cas thaum lub sij hawm meiosis kuv? Raws li tau hais dhau los, thawj zaug ntawm kev faib tawm nuclear uas tshwm sim thaum tsim gametes hu ua meiosis I. Nws tseem yog lub npe hu ua kev txo qis vim nws ua rau cov hlwb uas muaj ib nrab ntawm cov chromosomes raws li niam txiv cell
Kev Txom Nyem txhais li cas?
Kev faib tawm: thawj cell faib hauv meiosis, txheej txheem los ntawm cov kab mob hlwb tsim. Hauv kev txo qis, tus lej chromosome raug txo los ntawm diploid (46 chromosomes) mus rau haploid (23 chromosomes). Kuj tseem hu ua thawj meiotic faib thiab thawj meiosis.
Vim li cas meiosis hu ua equational division?
Nyob rau hauv meiosis diploid tus lej ntawm chromosomes raug txo mus rau tus lej haploid. … Nws yog hu ua equational division vim tus naj npawb ntawm chromosomes thiab tus nqi ntawm DNA nyob rau hauv cov ntxhais cell nyob twj ywm sib npaug rau niam txiv cells.
