Editing Cytogenetics (section)

=== McClintock's work on maize ===
[[Barbara McClintock]] began her career as a [[maize]] cytogeneticist. In 1931, McClintock and [[Harriet Creighton]] demonstrated that cytological recombination of marked [[chromosomes]] correlated with recombination of genetic [[Trait (biological)|trait]]s ([[gene]]s). McClintock, while at the [[Carnegie Institution]], continued previous studies on the mechanisms of chromosome breakage and fusion flare in maize. She identified a particular chromosome breakage event that always occurred at the same locus on maize chromosome 9, which she named the "''Ds"'' or "dissociation" locus.<ref>{{cite journal |last1=Ravindran |first1=Sandeep |title=Barbara McClintock and the discovery of jumping genes |journal=Proceedings of the National Academy of Sciences of the United States of America |date=11 December 2012 |volume=109 |issue=50 |pages=20198–20199 |doi=10.1073/pnas.1219372109 |pmid=23236127 |pmc=3528533 |doi-access=free }}</ref> McClintock continued her career in cytogenetics studying the mechanics and inheritance of broken and ring (circular) chromosomes of maize. During her cytogenetic work, McClintock discovered [[transposon]]s, a find which eventually led to her [[Nobel Prize]] in 1983.