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Results 1 - 2 of 2 for Mental "retardation," "X-linked" 1
  1. Menkes disease 
    ... gene, each of her sons has a 50% (1 in 2) chance of developing the disease, and 50% of her daughters will be a carrier of the disease. This kind of gene inheritance is called X-linked recessive . In some people, the disease is not ...
    https://medlineplus.gov/ency/article/001160.htm - Medical Encyclopedia
  2. Fragile X syndrome 
    ... It is the most common form of inherited intellectual disability in boys. ... history of fragile X syndrome, developmental problems, or intellectual disability may not be present.
    https://medlineplus.gov/ency/article/001668.htm - Medical Encyclopedia