| 21. | Unlike his schoolmates, Jake was born with chromosomal fragile-X syndrome, the leading cause of inherited mental retardation.
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| 22. | Other possibilities include chromosomal disorders such as Down syndrome, Klinefelter syndrome, XYY syndrome and fragile X syndrome.
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| 23. | Although I have not actually had my genome screened, all the anatomical signs of Double-X Syndrome are there.
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| 24. | The paradox is named after Stephanie Sherman, who studied the inheritance patterns of people with Fragile X syndrome.
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| 25. | Sherman observed that the effects of Fragile X syndrome seemed to occur more frequently with each passing generation.
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| 26. | On average, five to ten girls with triple X syndrome are born in the United States each day.
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| 27. | Triple X syndrome is not inherited, but usually, occurs as an event during the formation of sperm ).
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| 28. | Cherubism has also been found combined with other genetic disorders including Noonan syndrome, Ramon syndrome, and Fragile X syndrome.
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| 29. | A link has been suggested between microchromosome presence and certain genetic disorders like Down syndrome and fragile X syndrome.
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| 30. | Examples of mutations on the X chromosome include more common diseases such as color blindness, hemophilia, and fragile-X syndrome.
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