Gynaecology & Obstetrics General obstetrics c7a033f5 Absolute proof of monozygosity is determined by A DNA finger printing B Intervening membrane layers C Sex of the babies D Reciprocal skin grafting High-Yield Explanation Zygosity refers to the type of conception and can only be determined by DNA testing. Refer page no 179 of Text book of obstetrics,sheila balakrishnan,2 nd edition.