Male-female differentiation of fetus occurs at: (A) 2-4 weeks, (B) 10-12 weeks, (C) 16-18 weeks, (D) 24-26 weeks
Answer is B. Genotype of embryo is established at feilization. But male and female embryos are phenotypically distinguishbletill week 6. Ref: Gray's 39e/p-1289