Psychiatry A mother has a first child of “Trisomy-21” (Down’s syndrome). What is the percentage of occurrence of reccurence in 2nd child? A 50% B 25% C 15% D 1% 💡 Explanation A mother has a first child of "Trisomy-21" (Down's syndrome). What is the percentage of occurrence of reccurence in 2nd child? ✓ Correct Answer: D. 1%