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American Zoologist 1982 22(1):57-64; doi:10.1093/icb/22.1.57
© 1982 by The Society for Integrative and Comparative Biology
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The Mode of Action of the Bithorax Genes of Drosophila melanogaster1

GINES MORATA
Centro de Biologia Molecular, Universidad Autonoma de Madrid Madrid-34, Spain

SYNOPSIS. The activity of the genes of the bithorax complex (BX-C) of Drosophila is necessary for the normal development of thoracic and abdominal segments. Primordia destined to form the different segments of the fly are established in different positions prior to BX-C function. Different combinations of BX-C genes are then activated in each position to specify for the different segment types. In this process some BX-C genes act before others. I propose a temporal binary mechanism which accounts for the different combinations of active and inactive BX-C genes in the thoracic segments.


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