Qhov sib txawv tseem ceeb ntawm chromosome thiab chromatid yog tias chromosome yog ib daim ntawv ntev zoo li DNA molecule thaum chromatid yog ib nrab ntawm ob daim ntawv luam ntawm cov chromosome replicated. Qhov tseeb, ob lub chromatids tau koom ua ke los ntawm centromere los tsim ib chromosome.
Chromosome thiab chromatid yog cov qauv zoo sib xws uas yog tsim los ntawm DNA molecules. Chromosomes muaj cov ntaub ntawv caj ces nyob rau hauv daim ntawv ntawm cov DNA ib ntus lossis cov noob caj noob ces. Ib txoj hlua ntawm DNA hu ua chromosome thiab ob chromatids yuav tsim ib qho chromosome. Chromosomes yog vectors lossis carriage ntawm cov khoom siv caj ces ntawm ib lub cev mus rau lwm qhov thaum chromatids pab cov hlwb no kom duplicate.
Chromosome yog dab tsi?
Chromosomes yog cov xov zoo li cov qauv ntawm DNA molecules tam sim no nyob rau hauv nucleus ntawm txhua lub cell hauv peb lub cev. Hauv tib neeg lub cev, muaj tag nrho ntawm 46 tus neeg chromosomes. Lawv nyob hauv 23 homologous chromosome khub. Kev sib koom ua ke ntawm 46 chromosomes tshwm sim thaum lub sij hawm ob txoj kev faib cell: meiosis thiab mitosis.
Daim duab 01: Chromosomes thaum Mitosis
Raws li German biologist, Theodor Heinrich Boveri, chromosomes yog vectors ntawm heredity.
Chromatid yog dab tsi?
Chromatid yog ib qho ntawm ob daim qauv zoo sib xws ntawm DNA uas ua rau tib chromosome. Ib chromosome muaj ob chromatids koom nrog ib tug centromere. Thaum lub sij hawm cell faib (meiosis thiab mitosis), lawv tau sib cais los ntawm ib leeg; lawv thiaj li hu ua muam chromatids vim lawv zoo ib yam.
Daim duab 02: Chromatid thiab Chromosome
Yuav kom paub meej dua, chromosome zoo li tus qauv X zoo li thaum pom hauv lub tshuab ntsuas. Faib X los ntawm ib nrab thiab nws yuav ua rau ob qho tib si > thiab < yog qhov koj hu ua chromatid. Qhov chaw nruab nrab ntawm kev sib cuag yog centromere thiab tag nrho X yog chromosome.
Dab tsi yog qhov zoo sib xws ntawm Chromosome thiab Chromatid?
- Chromosomes thiab chromatids yog tsim los ntawm DNA molecules.
- Lawv muaj nyob rau hauv lub nucleus.
- Ob leeg muaj cov ntaub ntawv genetic thiab koom nrog kev xeeb tub.
- Lawv cuam tshuam nrog histone proteins.
Qhov txawv ntawm Chromosome thiab Chromatid yog dab tsi?
Chromosome yog cov qauv zoo li cov xov uas muaj cov khoom siv caj ces ntawm cov kab mob thaum chromatid yog txhua yam ntawm ob daim ntawv luam uas ua rau chromosome. Qhov no yog qhov sib txawv tseem ceeb ntawm chromosome thiab chromatid. Ib qho ntxiv ntawm qhov sib txawv ntawm chromosome thiab chromatid yog tias cov chromosomes nqa cov ntaub ntawv keeb kwm ntawm cov kab mob thaum cov chromatids tso cai rau DNA duplication. Tsis tas li ntawd, chromosomes muaj cov DNA nruj nreem kaw thaum chromatids muaj cov DNA tsis raug mob.
Cov ntawv qhia hauv qab no nthuav tawm qhov sib txawv ntawm chromosome thiab chromatid hauv daim ntawv teev npe rau kev siv ceev.
Summary – Chromosome vs Chromatid
A chromosome yog ib txoj hlua ntev thiab txuas ntxiv ntawm DNA. Ib tug duplicated chromosome muaj ob tug viv ncaus zoo tib yam chromatids. Yog li ntawd, ib tug chromatid yog ib qho ntawm ob daim ntawv luam ntawm ib tug duplicated chromosome. Chromosomes yog cov vectors ntawm kev xeeb tub. Hauv lwm lo lus, nws nqa cov ntaub ntawv caj ces uas dhau los ntawm niam txiv mus rau cov xeeb ntxwv. Zuag qhia tag nrho, qhov no yog qhov txawv ntawm chromosome thiab chromatids.
