Panguva imwe nguva muMissouri, McClintock akawedzera kutsvakurudza kwake pamusoro pemigumisiro ye X-rays pamakona cytogenetics. McClintock akacherechedza kuputsika uye kusanganiswa kwema chromosomes mumasero emagetsi emagetsi. Akakwanisawo kuratidza kuti, mune zvimwe zvirimwa, kuputsika kwema chromosome kwakangoitika mumasero e endosperm. Mukufamba kwe mitosis, akacherechedza kuti magumo emakromatids akaputsika akabatanidzwazve mushure mekudzokorora kwema chromosome. Mune imwe chikamu che mitaphase, makromatids akaputsika akaumba bhiriji ye chromatid, iyo yakaputsika apo makromatids akatamira kumativi emasero.
Carnegie Institution yeWashington