Most common chromosomal abnormality

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Most common chromosomal abnormality

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[A] Marfan syndrome
[B] Down syndrome
[C] Turnor syndrome
[D] Patau syndrome

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Types of Down Syndrome

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• Trisomy 21 -Most Common
• Mosaic Down syndrome accounts for – two per cent of Down syndrome cases
• Translocation Down syndrome – accounts for three per cent of cases

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