Micronuclei waa koromosoomyada oo dhan ama jajabyo acentric ah ama koromosoomyada giraanta kuwaas oo ku sii jira cytoplasm marka koromosoomyadu ay si joogto ah u galaan unugyada gabadha si ay u sameeyaan nuklei ka dib mitosis.
Alaabaha hadda la helay, aad ayaan ugu qanacsannahay, alaab-qeybiye aad u wanaagsan, waxaan rajeyneynaa inaan sameyno dadaallo joogto ah si aan u sii wanaajino.