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Fig. 1. Skeletal pattern and chondrogenesis in the ozd mutant limbs. (A) A homozygous ozd embryo at day 10 of development showing limb-specific skeletal deficiencies. (B) Skeletal preparations of ozd wing and leg compared with stage-matched wild-type limbs. (C) Higher magnification image comparing morphology of the ozd leg digit (asterisk) with wild-type leg d1. (D) Alcian Green preparations comparing chondrogenic condensations in st. 25 and 27 wild-type and ozd limbs. f, femur; fi, fibula; h, humerus; r, radius; t, tibia; u, ulna.