A married middle aged female gives history of repeated abortions for the past 5 years. Which of the following chromosomal anomaly is the most common cause for this?
• The given karyogram shows three chromosomes at 21 instead of a pair. It is called Trisomy 21.
• Trisomy 21 is synonymous with Down’s syndrome and is the most common of the chromosomal disorders. It is a major cause of mental retardation.
• Other trisomies are Edward syndrome (Trisomy 18) and Patau syndrome (Trisomy 13)
Klinefelter's syndrome
Turner's syndrome
Down's syndrome
Patau's syndrome