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Fig. 4. Molting defects of ecd mutants. (A) Presence of the second instar
(smaller arrows) and third instar (larger arrows) mouth hooks in an
ecd1/ecd2 heterozygous larva kept at 29°C.
(B) Two pairs of mouth hooks in an ecdg24/Df(3L)R+R2
hemizygote that died during the first molt. The first instar mouth hooks are
indicated by small arrows and the second instar ones are indicated by larger
arrows. (C) First instar cuticle attached through the first instar mouth hooks
(arrow) to the new cuticle in an ecdg24 hemizygote.