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Byju's Answer
Standard X
Biology
Plant Breeding
Genotype #1...
Question
Genotype of Down's syndrome is:-
A
45 + XX
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B
44 + XY
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C
44 + XXY
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D
22 + XY
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Solution
The correct option is
A
45 + XX
Genotype of Down's syndrome is 45+ XX where 21st chromosome undergoes trisomy.
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