Chromosome Structure, Sciara

Numéro d’image : 12631550
Chromosome Structure, Sciara
Microscopic image of the chromosome structure in the salivary glands of sciara taken by Barbara McClintock in 1934. In the late 1920s, she studied how genes could jump during the breeding of maize plants. She did groundbreaking research on this phenomenon, determining the physical correlate of genetic crossing-over. During the 1940s and 1950s, McClintock showed how certain genes were responsible for turning on or off physical characteristics, such as the colour individual corn kernels. She developed theories to explain the suppression or expression of genetic information from one generation of maize plants to the next that defied the common wisdom of molecular biology prevalent during the 1950s. In 1983 she received the Nobel Prize in Physiology or Medicine for her work on mobile genetic elements, that is, genetic transposition, or the ability of genes to change position on the chromosome. McClintock was the first woman to receive an unshared Nobel
Licence : Droits gérés
Crédit: Science Photo Library / Science Source
Taille de l’image : 5488 px × 4378 px
Model Release : Non requis
Property Release : Non requis
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