Barbara McClintock
= Barbara McClintock
{c}
<Barbara McClintock> (1902–1992) investigated inherited variation in <maize>, combining <chromosome> observations with the transmission of visible traits. Her work identified mobile controlling elements, now understood as <transposable elements>, showing that genetic regulation need not be represented by permanently fixed <gene> positions.<The origin and behavior of mutable loci in maize by Barbara McClintock>[1950, pp. 344–355]{ref}
Coloured and uncoloured sectors in <maize> <tissues> provided an observable record of changes occurring during <biological development>. Connecting those patterns to genetic and cytological evidence made movement and regulation experimentally testable. She received the 1983 <Nobel Prize in Physiology or Medicine> for the discovery of mobile genetic elements.https://www.nobelprize.org/prizes/medicine/1983/summary/[Official award record]{ref}