बच्चो के लिंग निर्धारण के लिए उत्तरदायी क्रोमोसोस होता है ? - Which chromosome is responsible for determining the sex of children? - Bachho Ke Ling Nirdharan Ke Liye Uttardayi chromosome Hota Hai ? General Science in hindi, Biology Mata Ka question answers in hindi pdf Mata Wa Pita Dono Ka questions in hindi, Know About Pita Ka General Science online test General Science notes in hindi quiz book Inme Se Koi Nahin