Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: A lokacin rani na 1944 a Cold Spring Harbor Laboratory, McClintock ya fara nazarin tsarin kan tsarin tsarin launi na hatsi na hatsi na hatsi da kuma gado mai banƙyama na wannan mosaicism. Ta gano sabbin abubuwa guda biyu masu rinjaye da kuma hulɗar kwayoyin halittar da ta kira Dissociation (Ds) da Activator (Ac). Ta gano cewa Rarrabuwa ba kawai ya rabu ko ya sa chromosome ya karye ba, yana da tasiri iri-iri a kan kwayoyin da ke makwabtaka da shi lokacin da Mai kunnawa ya kasance, wanda ya haɗa da sanya wasu ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan. A farkon shekarar 1948, ta yi abin mamaki gano cewa duka Dissociation da Activator na iya canzawa, ko canza matsayi, akan chromosome. Ta lura da tasirin sauyawar Ac da Ds ta hanyar canza tsarin launi a cikin ƙwayar masara a cikin tsararraki na giciye da aka sarrafa, kuma ta bayyana alaƙar da ke tsakanin wuraren biyu ta hanyar bincike mai zurfi. Ta kammala cewa Ac yana sarrafa sauyawar Ds daga chromosome 9, kuma cewa motsi na Ds yana tare da karyewar chromosome. Lokacin da Ds ke motsawa, ana sakin kwayar halittar launin aleurone daga tasirin Ds mai hanawa kuma ya canza zuwa nau'i mai aiki, wanda ke fara hadawar pigment a cikin sel. Canjin Ds a cikin sel daban-daban bazuwar ne, yana iya motsawa a wasu amma ba wasu ba, wanda ke haifar da mosaicism mai launi. Girman tabo mai launi a kan tsaba an ƙayyade shi ta hanyar matakin ci gaban tsaba yayin rarrabuwa. McClintock kuma ta gano cewa sauyawar Ds an ƙaddara ta yawan kwafin Ac a cikin tantanin halitta. Tsakanin 1948 da 1950, ta haɓaka ka'idar da waɗannan abubuwa masu motsi ke tsara kwayoyin halitta ta hanyar hanawa ko daidaita ayyukansu. Ta ambaci Dissociation da Activator a matsayin "kayan sarrafawa"<unk> daga baya, a matsayin "abubuwan sarrafawa"<unk> don bambanta su daga kwayoyin halitta. Ta yi hasashen cewa tsarin kwayar halitta zai iya bayyana yadda ƙwayoyin halitta masu yawa da aka yi da ƙwayoyin cuta masu kama da juna suke da ƙwayoyin cuta masu aiki dabam dabam....  Tambaya: Menene aka sani da raka'a masu sarrafawa daga baya?
abubuwan sarrafawa