Thaum lub sijhawm interphase (1), chromatin yog nyob rau hauv nws qhov tsawg kawg nkaus condensed lub xeev thiab zoo li xoob faib thoob plaws hauv lub nucleus. Chromatin condensation pib thaum prophase (2) thiab chromosomes pom. Chromosomes tseem condensed thoob plaws hauv ntau theem ntawm mitosis (2-5).
Dab tsi yog condensed chromatin?
Chromatin yog ib qho nyuaj ntawm DNA thiab cov proteins uas forms chromosomes nyob rau hauv lub nucleus ntawm eukaryotic hlwb. Nuclear DNA tsis tshwm sim hauv cov kab dawb dawb; nws yog condensed heev thiab qhwv ib ncig ntawm cov proteins ntawm nuclear thiaj li haum rau hauv lub nucleus. Chromatin muaj nyob rau hauv ob hom.
Puas yog condensed chromatin active?
Nws yog feem ntau ntseeg tias silent chromatin yog condensedthiab transcriptionally active chromatin yog decondensed. Txawm li cas los xij, me ntsis paub txog kev sib raug zoo ntawm qib condensation thiab gene qhia.
Lub cev condensed ntawm chromatin yog dab tsi?
Euchromatin yog daim ntawv me me ntawm chromatin, whereas heterochromatinyog hais txog daim ntawv condensed. Euchromatin thiab heterochromatin yog cov ua haujlwm thiab cov qauv sib txawv, thiab muaj lub luag haujlwm tseem ceeb hauv kev hloov pauv thiab kev qhia ntawm cov noob.
piv txwv ntawm chromatin yog dab tsi?
Piv txwv li, spermatozoa thiab avian cov qe ntshav liab muaj cov chromatin nruj dua li cov hlwb eukaryotic feem ntau, thiab trypanosomatid protozoa tsis condense lawv.chromatin rau hauv pom chromosomes txhua. … Cov qauv hauv zos ntawm chromatin thaum lub sij hawm interphase nyob ntawm cov noob tshwj xeeb uas muaj nyob hauv DNA.
