Pediatrics Down’s syndrome is associated with mental retardation. Which of the following abnormalities are not found in Down’s syndrome? A Deletion 21 B Trisomy 21 C Translocation t (13,21), t (21,21) D Mosaic 21 💡 Explanation Down's syndrome is associated with mental retardation. Which of the following abnormalities are not found in Down's syndrome? ✓ Correct Answer: A. Deletion 21