Figure 3. mes Genes Are Required to Specify V Ray Pattern, Position, and Hox Gene Expression(A) A
mes-3(
ez12) mutant male showing a fusionof rays 2 and 3. (B) A
mes-6(
bn66) mutant male showing anterior displacement of V ray 1. V rays on the affected side are numbered. Ray 1 occupies its normal position on the opposite side. (C) A
mes-3(
ez12) male with four ectopic rays, indicated by arrowheads, in the lateral hypodermis.V rays 2-6 occupy their normal positions in the posterior. (D) In a wild-type L3 male,
egl-5::gfp is expressed in anterior and posterior daughtersof V ray precursors R4-R6. (E) In a
mes-6(
bn66) mutant L3 male,
egl5::gfpis expressed outside its normal domain, in daughters of the V ray precursors R1 and R3. (F and G) Differential interference contrast (DIC) micrographs of tails shown in (D) and (E). (H) A wild-type L3 male expressing
lin-32::gfpin nine pairs of descendants of the ray neuroblasts (Rn.a cells).(I) A
mes-6(
bn66) mutant male expressing
lin32::gfp ectopically, in a total of 12 pairs of ray neuroblast descendants.