2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov lus teb raug: Cov chromosomes homologous muaj ob chromosomes thiab plaub chromatids nyob rau theem prophase.
Yuav ua li cas rau chromosomes thaum lub sij hawm prophase?
Thaum lub sijhawm prophase, qhov nyuaj ntawm DNA thiab cov proteins uas muaj nyob hauv cov nucleus, hu ua chromatin, condenses. Cov chromatin coils thiab dhau los ua compact, ua rau tsim cov chromosomes pom. … Cov chromosomes replicated muaj X zoo thiab hu ua muam chromatids.
Lub sijhawm twg ntawm meiosis yuav cov chromosomes homologous khub?
Thaum prophase I, homologous chromosomes khub thiab sib pauv ntu ntawm DNA. Qhov no yog hu ua recombination los yog hla dhau. Qhov no yog ua raws li metaphase I qhov twg cov khub sib txuas ntawm chromosomes nyob nruab nrab ntawm lub cell.
Qhov xwm txheej twg tshwm sim ua ntej pib mitosis?
Prophase. Mitosis pib nrog prophase, thaum lub sijhawm chromosomes nrhiav condensin thiab pib ua cov txheej txheem condensation uas yuav txuas ntxiv mus txog thaum metaphase. Hauv ntau hom, cohesin feem ntau raug tshem tawm ntawm caj npab ntawm tus muam chromatids thaum lub sij hawm prophase, tso cai rau tus viv ncaus chromatids daws tau.
Cov xwm txheej twg tsis tshwm sim ua ntej pib mitosis?
Qhov xwm txheej twg tsis tshwm sim ua ntej pib mitosis? Lub nuclearhnab ntawv disintegrates. DNA yog replicated.
Pom zoo:
Yuav tsum ua kom homologous chromosomes khub?
Lub homologous chromosomes nyob rau hauv lub cell yuav tsis ua khubthiab tau txais kev tshuaj ntsuam genetic recombination nrog ib leeg. Vim li cas homologous chromosomes khub? Lub homologous chromosomes nyob rau hauv lub nucleus ntawm lub cev gamete khub thaum lub sij hawm meiosis.
Lub sijhawm meiosis homologous khub ntawm chromosomes?
Ua ntej cov kab mob nkag mus rau meiosis, lawv feem ntau yog diploid, txhais tau tias lawv muaj ob daim ntawv luam ntawm txhua tus chromosome. Tom qab ntawd, ua ntej cov kab mob nkag mus rau hauv meiosis, nws duplicates nws DNA kom lub cell muaj plaub DNA luam tawm ntawm ob khub ntawm homologous chromosomes.
Lub sijhawm kuv lub sijhawm dawb lossis thaum kuv lub sijhawm dawb?
yog li, qhov no txhais tau tias "thaum kuv lub sijhawm dawb" tsis siv ntauthiab koj muab "hauv kuv lub sijhawm dawb" ntau dua nyob rau qhov kawg ntawm kab lus. Piv txwv li: Kuv tau taug kev tus dev thaum kuv lub sijhawm dawb.
Lub sijhawm nyob qhov twg ntawm lub sijhawm teem sijhawm?
kab kab rov tav ntawm lub rooj ntu ntu yog hu ua ntu ntu. Lub sijhawm nyob rau ntawm lub sijhawm nyob qhov twg? Ib lub sijhawm yog kab kab rov tav ntawm lub rooj ntu ntu. Muaj xya lub sij hawm nyob rau hauv lub sij hawm ntawm lub sij hawm, nrog txhua tus pib ntawm sab laug.
Puas yuav homologous chromosomes khub thaum meiosis?
Homologous chromosomes tsis ua haujlwm zoo ib yam hauv mitosis li lawv ua hauv meiosis. Ua ntej txhua tus mitotic faib ib lub xovtooj mus, cov chromosomes hauv niam txiv cell rov ua dua lawv tus kheej. Lub homologous chromosomes nyob rau hauv lub cell yuav ib txwm tsis ua khubthiab tau txais genetic recombination nrog ib leeg.
