<prompt> All of the following take part in male genital tract development exceptSRYSOX-9FGF-9WNT-4  <response>: Ans. is d, i.e. WNT-4Ref: Langman Embryology 12thed, p46-247Genes for male developmentSRY geneMaster Gene for testis developmentSOX 9SRY and SOX 9 induce testis to form FGF-9 chemotactic factor. FGF-9 causes tubules from mesonepric duct to penetrate gonadal ridgeSF1 steroidogenic factorIt stimulates differentiation of sertoli or leydig cellsWNT-4 is ovary determining gene. This gene upregulates DAXI which inhibits the function of SOX 9 in females. 