Yog hais tias kev sib koom ua ke ntawm cov chromosome uas tawg lawm xaus nrog ob chromosomes, ob qho kev txawv txav chromosomes tshwm sim: txhua tus muaj ib feem tau los ntawm lwm cov chromosome thiab tsis muaj ib feem ntawm nws tus kheej. Cov no yog hu ua translocations.
Qhov kev hloov pauv twg tshwm sim ntawm ob chromosome?
A translocation tshwm sim thaum ib daim ntawm ib chromosome tawg tawm thiab txuas mus rau lwm chromosome. Hom kev hloov pauv no tau piav qhia tias muaj kev sib npaug yog tias tsis muaj cov khoom siv caj ces tau txais lossis ploj hauv lub cell. Yog tias muaj qhov nce lossis poob ntawm cov khoom siv caj ces, qhov kev hloov pauv tau piav qhia tias tsis sib npaug.
hom kev hloov pauv twg muaj ob lub chromosomes uas tsis yog homologous?
Kev hloov pauv. Translocation muaj ob homologous chromosomes thiab tshwm sim qhov twg ib daim ntawm chromosome tawg tawm thiab rov txuas mus rau lwm cov chromosome uas tsis yog homologous.
ob qhov kev hloov pauv yog dab tsi?
Muaj ntau hom kev hloov pauv. Ob pawg loj ntawm kev hloov pauv yog germline mutations thiab somatic mutations Germline mutations tshwm sim hauv gametes. Cov kev hloov pauv no tseem ceeb tshwj xeeb vim tias lawv tuaj yeem xa mus rau cov xeeb ntxwv thiab txhua lub cell ntawm cov xeeb ntxwv yuav muaj qhov hloov pauv.
Kev hloov pauv puas tuaj yeem yog qhov hloov pauv hloov pauv?
Qee cov kws tshawb fawb pom lwm hom kev hloov pauv, hu ua frameshift mutation, ua ib hom kev hloov pauv. Frameshift mutations tuaj yeem ua rau poob siab heevthiab tshwm sim los ntawm kev ntxiv lossis tshem tawm ntawm ib lossis ntau dua DNA hauv paus.
