Abstract:The evolution of the functionality of genes and genetic systems is a major source of animal diversity. Its best example is insect sex differentiation systems: promoting male and female differentiation (dual-functionality) or only male differentiation (single-functionality). However, the evolutionary origin of such functional diversity is largely unknown. Here, we investigate the ancestral functions of doublesex, a key factor of insect sex differentiation system, using the apterygote insect, Thermobia domestica… Show more
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