डाउन सिंड्रोम कारण

उत्तर: (A) a,bDown syndrome: 21st chromosome pair fails to separate during meiosis(a correct) OR extra broken piece of 21st chromosome attaches to another(b correct). NOT 23rd pair(c wrong), NOT XYY(d wrong — that'...

2025Level 2Medium
डाउन सिंड्रोम कारण
Child Development & PedagogyLearning Disabilities
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