Why is having an extra chromosome 21 Harmful?

Related questions

1. What happens if you have an XXY chromosome?
2. Can a person change their chromosomes?
3. What would happen if a human has two Y chromosomes?
4. Is Klinefelter an intersex?
5. What happens if you have 1 less chromosome?
6. Why is there no YY genotype?
7. Can you remove an extra chromosome?
8. What is the life expectancy of someone with XYY syndrome?
9. What does XXY chromosome mean?
10. Is XXY fertile?

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11. #copies
12. #increased
13. #genes
14. #health
15. #disrupts
16. #chromosome
17. #development
18. #causing
19. #features
20. #course