Nondisjunction tuaj yeem tshwm sim thaum anaphase of mitosis, meiosis I, lossis meiosis II. Thaum lub sij hawm anaphase, tus muam chromatids (los yog homologous chromosomes rau meiosis I), yuav sib cais thiab txav mus rau cov ncej ntawm tes, rub los ntawm microtubules.
Yuav ua li cas yog tias kev tsis sib haum xeeb tshwm sim thaum meiosis?
Yog tias tsis muaj kev cuam tshuam tshwm sim hauv meiosis kuv, tag nrho plaub yam khoom ntawm meiosis yuav chromosomally txawv txavOb ntawm plaub yam khoom ntawm meiosis yuav muaj ob daim ntawv theej ntawm chromosome koom nrog hauv qhov kev tshwm sim nondisjunction, thiab ob ntawm plaub yam khoom ntawm meiosis yuav tsis muaj cov ntawv luam ntawm cov chromosome tshwj xeeb.
Koj paub li cas yog tias kev tsis sib haum xeeb tshwm sim hauv meiosis 1 lossis 2?
Nondisjunction tuaj yeem tshwm sim thaum lub sijhawm meiosis I thiab meiosis II, ua rau cov chromosomes txawv txav ntawm gametes. Qhov sib txawv tseem ceeb ntawm kev tsis sib haum xeeb hauv meiosis 1 thiab 2 yog qhov thaum lub sijhawm meiosis 1, homologous chromosomes tsis sib cais thaum nyob hauv meiosis II tus muam chromatids tsis cais
Cov piv txwv ntawm kev tsis sib haum yog dab tsi?
Qhov no tuaj yeem ua rau muaj tus mob nyob rau hauv tus ntxhais cell muaj tus lej ntawm chromosomes txawv txav; ib lub cell muaj ntau chromosomes thaum lwm lub cell tsis muaj. Piv txwv ntawm nondisjunction: Down syndrome Triple-X syndrome Klinefelter's Syndrome
Dab tsi yog kev tsis sib haum xeeb thiab thaum twg hauv meiosis tuaj yeem tshwm sim quizlet?
Nondisjunction tuaj yeem tshwm sim thaum anaphase ntawm meiosis I lossis meiosis II. Yog hais tias nws tshwm sim thaum lub sij hawm meiosis kuv, tag nrho bivalent migrate mus rau ib tug ncej (Daim duab 8.22a). Tom qab ua tiav ntawm meiosis, plaub lub hlwb haploid tshwm sim los ntawm qhov xwm txheej no txawv txav.
