Fig. 11. Cell death in wild-type and mutant embryos. Lateral views of TUNEL-labeled
embryos at 24 hours. (A) wild type; (B) homozygous sox9a-
embryo; (C) homozygous sox9bb971mutant embryo; (D)
sox9b-MO-treated wild-type embryos; (E) double mutant. Cell death is
increased in sox9bb971 mutants, sox9b MO-treated embryos,
and in double mutants. Scale bar: in E, 100 µm.