Answers

2014-11-22T20:13:25+05:30
Genetic disorders not only come from parents but also from their relatives also if our dna natches with any of our nearest relatives we will get diseases frm them much faster
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if there is an extra chromosome in 21st pair then child will be abnormal..
2014-11-23T12:42:06+05:30
Genetic disorder occcurs in a child even if parents havent got it because the genes are characteristics which are carried to off springs,even if they are suppressed in one generation their is a chance of them to get characterised in other generation
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