2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Chiasmata yog qhov tseem ceeb rau qhov txuas ntawm homologous chromosomes rau cov ncej ntxaiv (bipolar txuas)thiab lawv cov kev sib cais tom qab rau cov ncej rov qab thaum lub sij hawm meiosis I.
Dab tsi yog qhov tseem ceeb ntawm chiasmata?
Chiasmata yog lub ntsiab lus uas sawv cev lossis qhia qhov txuas ntawm homologous chromosomes ua ke. Cov qauv no yog tsim thaum hla ntawm cov tsis yog tus muam chromatids tshwm sim. Chiasmata yog ib qho tseem ceeb vim nws yog lub ntsiab lus uas cov noob ntawm niam thiab txiv sib pauv thiab ua rau rov ua dua.
chiasmata yog dab tsi thiab nws lub luag haujlwm hauv kev hla dhau?
chiasmata) yog lub ntsiab lus ntawm kev sib cuag, qhov sib txuas ntawm lub cev, nruab nrab ntawm ob (tsis yog tus muam) chromatids belongs rau homologous chromosomes. … Cov ntsiab lus ntawm kev hla dhau los ua pom zoo li chiasma tom qab lub synaptonemal complex dissembles thiab homologous chromosomes me ntsis sib nrug ntawm ib leeg.
Vim li cas synapsis thiab chiasmata tseem ceeb meiosis?
Lub hauv paus ua haujlwm ntawm kev sib tham yog li ntawd kev txheeb xyuas homologues los ntawm kev ua khub, ib kauj ruam tseem ceeb rau kev ua tiav meiosis. Cov txheej txheem ntawm DNA kho thiab chiasma tsim uas tshwm sim tom qab synapsis muaj qhov tshwm sim ntawm ntau theem, los ntawm cellular ciaj sia mus txog rau kev cuam tshuam rau evolution nws tus kheej.
Vim li cas thiaj ua chiasmata?
Chiasmata yog cov qauv chromatin tshwj xeeb uas txuashomologous chromosomes ua ke kom txog thaum anaphase I (Fig. 45.1 thiab 45.10). Lawv tsim ntawm qhov chaw uas programmed DNA tawg tsim los ntawm Spo11 tau dhau los ua txoj hauv kev rov ua dua tshiab los tsim crossovers.
Pom zoo:
Puas pom qhov tseem ceeb yog vim li cas lossis vim li cas ho tsis?
Kev sib txuas lus pom kev pab cov neeg tuaj saib nkag siab cov ntaub ntawv. Nws ua rau kom nkag siab txog cov ntsiab lus. Hom duab ob sab uas pab kev sib txuas lus muaj xws li kos duab, kos duab kos duab, animation, kos npe, typography, graphic designs, thiab lwm yam.
Vim li cas txoj kev tseem ceeb tseem ceeb rau kev tswj xyuas qhov project?
txoj kev tseem ceeb tso cai rau pab pawg txheeb xyuas cov haujlwm tseem ceeb tshaj plaws hauv qhov project. … Qhov no muab kev nkag siab ntau dua rau koj qhov project ncua sij hawm thiab kev sib raug zoo ntawm cov haujlwm, ua rau koj nkag siab ntau ntxiv txog lub sijhawm ua haujlwm twg koj tuaj yeem hloov kho, thiab qhov twg yuav tsum nyob ib yam.
Vim li cas lub ntsiab lus tseem ceeb yog qhov tseem ceeb?
Grand mean centering sub lub ntsiab lus loj ntawm tus kwv yees siv qhov txhais los ntawm tag nrho cov qauv (X).. Vim li cas Grand txhais tau tias qhov chaw tseem ceeb? Lub ntsiab lus tseem ceeb yog qhov siv tau rov ntsuas duauas pab nrog kev txhais cov ntsiab lus cuam tshuam nrog kev cuam tshuam, nws txhais tau li cas, lossis qhov sib txawv ntawm txhua qib;
Dab tsi yog qhov tseem ceeb thiab vim li cas nws tseem ceeb los txheeb xyuas koj qhov tseem ceeb?
Qhov tseem ceeb yuav coj koj hauv kev txiav txim siab hauv lub neej thiab ua rau koj taug qab. Qhov tseem ceeb tshaj plaws, qhov tseem ceeb tshaj plaws yuav ua rau koj ntseeg siab hais tias "tsis yog." Lawv pab koj txheeb xyuas qhov xav tau tiag tiag hauv koj lub neej, piv rau lwm tus xav tias tseem ceeb.
Vim li cas qhov tseem ceeb ntawm qhov muaj zog thiab qhov tsis muaj zog yog qhov tseem ceeb?
Nws yog ib qho tseem ceeb rau qhov tseem ceeb ntawm qhov ua tau zoo thiab qhov tsis muaj zog vim qhov no pab lub tuam txhab txiav txim siab txog thaj chaw uas lawv yuav tsum tau txhim kho ntxiv rau thaj chaw uas lawv ua tau zoo hauv. Vim li cas lub zog thiab qhov tsis muaj zog tseem ceeb?
