Regarding sexual differentiation of the fetus
OptionB: SRY Gene located on Y chromosome encodes Testis Determining Factor which leads to the development of male genital organs Option C&D: Development of external genitalia is similar in males and females till the 6th week of IUL(Indifferent stage)....later develops in the direction of hormones. REFERENCE: TEXTBOOK OF CLINICAL EMBRYOLOGY... VISHRAM SINGH SECOND EDITION..PAGE NO:277
Gonadal development begins at 5th week of intrauterine life
Y chromosome determines the differentiation of ovaries
Female external genitalia development is completed by 10 weeks
Male sexual differentiation occurs earlier than females
General anatomy