2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nyob rau hauv txhua lub cell somatic ntawm lub cev, lub nucleus muaj ob daim ntawv theej ntawm txhua tus chromosome, hu ua homologous chromosomes. Somatic hlwb qee zaum hu ua "lub cev" hlwb. Homologous chromosomes yog cov khub uas muaj tib lub noob nyob rau hauv tib qhov chaw raws lawv qhov ntev.
Puas muaj homologous khub hauv mitosis?
Nco ntsoov tias, hauv mitosis, homologous chromosomes tsis ua ke. Hauv mitosis, homologous chromosomes kab kawg-rau-kawg thiaj li hais tias thaum lawv sib faib, txhua tus ntxhais ntawm tes tau txais ib tus muam chromatid los ntawm ob tus tswv cuab ntawm cov khub homologous. … Qhov sib txuas nruj ntawm homologous chromosomes hu ua synapsis.
Puas yog homologous chromosomes pom hauv gametes?
Homologous chromosomes yog cov khub uas muaj cov noob rau tib yam hauv qhov chaw zoo tib yam raws li lawv qhov ntev. … Hauv cov tsiaj, cov hlwb haploid uas muaj ib daim qauv ntawm txhua homologous chromosome raug pom tsuas yog hauv gametes. Gametes fuse nrog lwm haploid gamete los tsim ib lub cell diploid.
khub niam txiv sib yuav nyob qhov twg?
In metaphase I ntawm meiosis I, cov khub ntawm homologous chromosomes, tseem hu ua bivalents los yog tetrads, kab nyob rau hauv ib qho random order raws metaphase phaj. Qhov kev taw qhia random yog lwm txoj hauv kev rau cov hlwb los qhia txog kev hloov pauv caj ces.
YPob homologous chromosomes khub hauv meiosis?
Cov xwm txheej tshwm sim hauv meiosis tab sis tsis yog mitosis suav nroghomologous chromosomes ua ke, hla dhau, thiab ua raws li cov phaj metaphase hauv tetrads.
Pom zoo:
Lub sijhawm prophase ib khub homologous ntawm chromosomes muaj?
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.
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.
Ntawm qhov capillaries pom nyob rau hauv lub cev nyob qhov twg?
Nruam: Cov capillaries no tsis muaj perforations thiab cia tsuas yog me me molecules dhau mus. Lawv tam sim no hauv nqaij, tawv nqaij, rog, thiab paj hlwb. Fenestrated: Cov capillaries no muaj cov pores me me uas tso cai rau cov molecules me los ntawm thiab nyob hauv cov hnyuv, ob lub raum, thiab cov qog endocrine.
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.
