Pathology All of the following statements are true regarding down syndrome except? A Occurs due to meiotic non disjunction of chromosome 21 B Trisomy 21 C Most common CHD is enocardial cushion defect D It is the most common trisomy in humans 💡 Explanation All of the following statements are true regarding down syndrome except? ✓ Correct Answer: D. It is the most common trisomy in humans