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Across 4. caused by a deletion of chromosome #7 and causes mental retardation and a distinct facial appearance 5. severe combined immune deficiency syndrome 6. causes part of the spinal cord to stick out from the back of the body 9. XXY 12. causes the red blood cells to be shaped abnormally so they cannot carry oxygen to the organs properly 15. can be treated by giving the patient thyroid hormone 16. causes a variety of symptoms including a feeling of starving that can lead to excessive eating and obesity

Down 1. causes a sticky mucus in the lungs and digestive system making it hard to breath and digest food 2. causes infants to have abnormally small heads and problems with the eyes 3. one of the most common brain diseases of babies where brain turns spongy 7. caused by a deletion of a portion of chromosome #15 8. scientific name for dwarfism 10. can be diagnosed by looking at the number of X chromosomes in a person's karyotype 11. blood clotting disorder 13. high pitched cry sounds like a cat 14. causes malignant cells to form in large intestine