Kev hloov pauv tuaj yeem tshwm sim los ntawm DNA luam yuam kev thaum lub sijhawm faib cell, raug ionizing hluav taws xob, raug rau cov tshuaj hu ua mutagens, lossis kis los ntawm cov kab mob. Kab mob kab mob tshwm sim hauv qe thiab phevthiab tuaj yeem kis mus rau cov xeeb ntxwv, thaum somatic kev hloov pauv tshwm sim hauv lub cev hlwb thiab tsis dhau mus.
Kev hloov pauv tshwm sim nyob qhov twg hauv DNA rov ua dua?
Qhov no tuaj yeem yog qhov phem lossis qhov zoo. Kev hloov pauv yog qhov kev hloov pauv uas tshwm sim hauv peb cov DNA ntu, vim yog qhov yuam kev thaum DNA tau theej los yog los ntawm ib puag ncig xws li UV teeb thiab luam yeeb. Kev hloov pauv tuaj yeem tshwm sim thaum DNA rov ua dua yog tias ua yuam kev thiab tsis raug kho raws sijhawm.
Kev hloov pauv DNA lossis RNA nyob qhov twg?
Kev hloov pauv yog cov kev hloov pauv uas tshwm sim hauv cov nucleotide ntu ntawm DNA.
Kev hloov pauv yuav tsum tshwm sim nyob qhov twg?
Tau txais (lossis somatic) kev hloov pauv tshwm sim hauv DNA ntawm tib neeg lub hlwbqee lub sijhawm thaum tib neeg lub neej. Cov kev hloov pauv no tuaj yeem tshwm sim los ntawm ib puag ncig xws li hluav taws xob ultraviolet los ntawm lub hnub, lossis tuaj yeem tshwm sim yog tias ua yuam kev vim DNA luam nws tus kheej thaum lub sijhawm faib cell.
Nyob rau theem twg DNA hloov pauv tshwm sim?
Kev hloov pauv tshwm sim thaum DNA rov ua dua ua ntej meiosis. Hla thaum lub sij hawm metaphase kuv muab cov alleles los ntawm cov homologues sib txawv rau hauv kev sib txuas tshiab. Thaum meiosis tiav lawm, cov qe los yog phev muaj kev sib xyaw ntawm niam thiab txiv chromosomes.
