ClinicalPediatrics

Karyotype — Trisomy 21 Down Syndrome 47,XY,+21

1 MCQs in Pediatrics for NEET PG

1 Medium

Sample Questions

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A newborn male infant is diagnosed with Down syndrome. The karyotype notation marked **D** in the diagram reads 47,XY,+21. The parents are counseled about recurrence risk in future pregnancies. Based on this standard cytogenetic finding, what is the most likely mechanism of chromosome 21 nondisjunction and the recurrence risk in the next pregnancy?

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