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DNA द्विगुणन क्यों आवश्यक है?

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हमें ज्ञात है की DNA ही मनुष्य का आनुवंशिक पदार्थ होता है तथा यह जीवों के लक्षणों का निर्धारण करने के साथ-साथ माता-पिता के आनुवंशिक लक्षणों को एक-पीढ़ी से दूसरी पीढ़ी तक पहुँचाने का कार्य करता है, अतः इसका द्विगुणन आवश्यक है।

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