Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Muhimmancin gudunmawar McClintock ya bayyana a cikin shekarun 1960, lokacin da aikin Francois Jacob da Jacques Monod suka bayyana tsarin kwayoyin halitta na lac operon, wani ra'ayi da ta nuna tare da Ac / Ds a 1951. Bayan Jacob da Monod's 1961 Journal of Molecular Biology takarda "Hanyar sarrafa kwayoyin halitta a cikin haɗin sunadarai", McClintock ya rubuta wata kasida don American Naturalist kwatanta lac operon da aikinta kan sarrafa abubuwa a masara. Ko da a ƙarshen karni na ashirin, har yanzu ba a yarda da gudummawar McClintock ga ilmin halitta ba kamar yadda aka gano tsarin kwayoyin halitta. An ba da McClintock da yawa tare da gano fassarar bayan wasu masu bincike sun gano tsari a cikin kwayoyin cuta, yisti, da bacteriophages a ƙarshen 1960s da farkon 1970s. A wannan lokacin, ilimin kimiyyar kwayoyin halitta ya bunkasa fasaha mai mahimmanci, kuma masana kimiyya sun iya nuna tushen kwayoyin don sauyawa. A cikin 1970s, Ac da Ds wasu masana kimiyya suka kwafi kuma an nuna su zama transposons na aji na II. Ac cikakkiyar transposon ce wacce zata iya samar da transposase mai aiki, wanda ake buƙata don ɓangaren ya motsa cikin kwayar halitta. Ds yana da maye gurbi a cikin kwayar halittarsa, wanda ke nufin cewa ba zai iya motsawa ba tare da wata hanyar watsawa ba. Saboda haka, kamar yadda McClintock ya lura, Ds ba zai iya motsawa ba tare da Ac ba. An kuma bayyana Spm a matsayin transposon. Bincike na gaba ya nuna cewa transposons yawanci ba sa motsawa sai dai idan an sanya kwayar a ƙarƙashin damuwa, kamar ta hanyar haskakawa ko sake zagayowar fashewa-haɗuwa-gada, don haka kunna su yayin damuwa na iya zama tushen bambancin kwayar halitta don juyin halitta. McClintock ya fahimci rawar da transposons ke takawa a juyin halitta da canjin kwayar halitta tun kafin sauran masu bincike su fahimci manufar. A zamanin yau, ana amfani da Ac / Ds azaman kayan aiki a cikin ilimin halittar tsire-tsire don samar da tsire-tsire masu jujjuyawar da ake amfani da su don halayyar aikin kwayar halitta.  Tambaya: Me aka gano Spm a matsayin?
wani transposon