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Fig. 4. Inactivation of precocious heterochronic genes prevents the
supernumerary molt of let-7 mir-84 mutants. Synchronized
populations of L1 larvae were fed bacteria expressing dsRNA corresponding to
the indicated genes and cultivated at 25°C. Animals in the P0
generation were scored for fluorescence from mlt-10p::gfp-pest 56
hours later and then for viability the next day. To score F1
animals, progeny were collected, synchronized as L1 larvae, and then fed the
appropriate bacterial clone for an additional 55 hours.