Zygotic dazl mutants are sterile males. (A-C) Overall morphology of representative adult wild-type female (A), male (B) and dazl?7/ae57 compound heterozygote (C). Males and females are distinguished based on secondary sex traits (color and tubercles on male fins). (D-F) Dissected trunks with the gonad region, indicated with yellow dashed lines, of wild-type female (D), male (E) and dazl?7/ae57 compound heterozygote (F). (D?-F?) Higher magnification views of blue outlined region in D-F. (D?,E?) Oocytes in females (D?) and sperm/testicular structures of males (E?). No identifiable gametes or GCs were detected in compound heterozygotes (F?). (G-I) Gonads labeled with Vasa reveal the oocytes (G), spermatocytes (H) and a gonad lacking GCs (I).
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