2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Tom qab ntawd, ntawm qhov tseem ceeb thaum lub sijhawm interphase (hu ua S theem), lub xovtooj ntawm tes duplicates nws cov chromosomes thiab xyuas kom nws cov kab ke npaj rau kev faib cell. Yog tias txhua yam xwm txheej zoo tagnrho, tam sim no lub cell tau npaj txav mus rau thawj theem ntawm mitosis.
Nyob rau theem twg hauv mitosis thiab meiosis yog cov chromosomes replicated?
Thaum lub sijhawm prophase I, cov chromosomes condense thiab pom hauv lub nucleus. Vim hais tias txhua tus chromosome tau muab luam tawm thaum lub sij hawm S theemuas tau tshwm sim ua ntej prophase I, txhua tus tam sim no muaj ob tus muam chromatids koom nrog ntawm centromere. Qhov kev npaj no txhais tau tias txhua tus chromosome muaj cov duab ntawm X.
theem twg ntawm meiosis ua chromosomes replicate?
Meiosis I. Meiosis yog ua ntej los ntawm kev sib cuam tshuam uas muaj peb theem. G1 theem (tseem hu ua thawj qhov sib txawv) pib theem no thiab tsom mus rau kev loj hlob ntawm tes. Theem S yog tom ntej, thaum lub sijhawm DNA ntawm chromosomes rov ua dua.
qhov txawv ntawm meiosis 1 thiab meiosis 2 yog dab tsi?
Meiosis yog kev tsim tawm plaub lub noob caj noob ces haploid tus ntxhais los ntawm ib lub xov tooj ntawm niam txiv diploid. … Hauv meiosis II, cov chromosomes no tau muab cais ntxiv mus rau cov muam chromatids. Meiosis Kuv suav nrog kev hla lossis rov ua dua ntawm cov khoom siv caj ces ntawm cov chromosome khub, thaum meiosis II tsis.
Vim li casmeiosis 2 puas tsim nyog?
Cell Cycle and Cell Division. … Cov hlwb yog diploid, yog li ntawd hauv xaj kom faib cov chromosomes sib npaug ntawm cov menyuam ntxhais kom lawv muaj ib nrab ntawm cov chromosome, Meiosis II yog qhov tsim nyog.
Pom zoo:
Nyob rau theem twg ntawm erythropoiesis hemoglobin tshwm sim?
Thaum kev loj hlob, hemoglobin tshwm nyob rau hauv lub cell, thiab lub nucleus ua zuj zus me me. Tom qab ob peb hnub, lub cell poob nws cov nucleus thiab tom qab ntawd nkag mus rau hauv cov hlab ntsha hauv cov hlab ntsha ntawm cov hlab ntsws.
Leej twg nyob rau theem siab tshaj ntawm kev xav tsis thoob?
Stetson Wright Txuas ntxiv rau kev xav tsis thoob: Friday's 92 yog qhov qhab nia siab tshaj plaws. Puas muaj pes tsawg qib uas xav tsis thoob? Ninety theem tau kis thoob peb lub ntsiab lus pom, tab sis qhov sib txawv ntawm lawv tsawg thiab tsis muaj txiaj ntsig txaus rau kev ua si.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Lub sijhawm twg 3 theem yog chromosomes tsis pom?
Nws yog lub sijhawm interphase, telophase, thiab cytokinesis uas cov chromosomes tsis pom lawm. theem twg yog chromosomes tsis pom? Nyob rau hauv interphase, tus neeg chromosomes tsis pom, thiab chromatin zoo nkaus li diffuse thiab unorganized.
Thaum lub sijhawm tseem ceeb ntawm mitosis cov chromosomes yog?
Nqe Lus Nug: Thaum lub sij hawm tseem ceeb ntawm mitosis, cov chromosomes yog txav deb ntawm ib leeg mus rau cov ncej sab nraud ntawm tes O nyob rau hauv nruab nrab ntawm tes O rov qab mus rau chromatin daim ntawv txuas mus rau mitotic spindle microtubules ntawm centromere merphase Lub voj voog ntawm tes tau muab faib ua ob qhov tseem ceeb, … Cov chromosomes nyob qhov twg thaum lub sij hawm tseem ceeb ntawm mitosis?
