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Fig. 6. The Muv phenotype in ceh-20(mu290) animals. Nomarski photomicrographs of L4 larvae. (A) Wild-type animal showing a normal vulval invagination formed by P(5-7).p (arrowhead). (B) ceh-20(mu290) animal showing separate invaginations formed by P5.p and P6.p while P7.px (not shown) failed to divide further. P4.p also formed a small invagination. (C) ceh-20(mu290) animal showing an invagination at P2.p in addition to the invagination formed by P(5-7).p (not shown). (D) ceh-20(RNAi) animal showing P4.p forming a separate invagination adjacent to the invagination formed by P(5-7).p. (E) ceh-20(mu290) lin-39(n1760) animal showing separate invaginations formed by P5.p and P6.p. P7.p did not divide in this animal. (F) unc-62(mu232) animal showing the incomplete migration of some P7.p descendants towards P6.p descendants, resulting in the asymmetric invagination. Animals in all panels are oriented with anterior towards the left.