1 Answers

Option 4 : None of I, II and III 

Disease  Reason  Symptom 
Down's Syndrome  It happens when an extra chromosome is added to the 21st autosomal chromosome.  The person becomes Mangolian. 
Patau's Syndrome  It is caused due to the addition of an extra chromosome in the 13th chromosome.  There is a cut mark in the lips and the person is mentally retarded. 
Sickle Cell Anaemia  It happens due to the change in the 11th autosomal chromosome  Since erythrocytes are destroyed rapidly, it leads to anaemia. 

 

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