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Explore the fascinating world of fruit fly development and genetics in this 54-minute lecture from The Royal Institution's 1986 Christmas Lectures series. Discover how Professor Lewis Wolpert uses the humble fruit fly as a model organism to understand genetic control of development, examining how genes appear as bands on the fly's unusually large chromosomes and how their activity becomes visible during larval metamorphosis into adult flies. Learn about the remarkable imaginal discs that larvae carry like a DIY kit for adult body parts, and investigate the extraordinary homeotic genes that can transform one body structure into another, creating flies with legs instead of antennae or four wings instead of two. Delve into genetic mosaics and compartments - invisible boundaries that cells will not cross and which operate under common genetic control. Examine the groundbreaking discovery of the homeobox, a highly conserved DNA sequence found in homeotic genes that codes for proteins and appears across species from flies to humans, mice, birds, and worms. Consider whether this genetic mechanism might be the key to understanding developmental biology that researchers have long sought, as part of the broader "Frankenstein's Quest" series exploring how life is generated from a single fertilized egg.
