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Hyperactive behavior; Large body size; Large forehead or ears with a prominent jaw; Large testicles (macro-orchidism) after the beginning of puberty; Mental retardation;
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Individuals with fragile X syndrome appear normal at birth but their development is delayed. Most boys with fragile X syndrome have mental impairment. The severity of mental impairment ranges from learning disabilities to severe mental retardation...
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For reasons not fully understood, the CGG sequence in the FMR-1 gene can expand to contain between 54 and 230 repeats. This stage of expansion is called a premutation. People who carry a premutation do not usually have symptoms of fragile X syndro...
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Individuals with fragile X syndrome appear normal at birth but their development is delayed. Most boys with fragile X syndrome have mental impairment. The severity of mental impairment ranges from learning disabilities to severe mental retardation...
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For reasons not fully understood, the CGG sequence in the FMR-1 gene can expand through succeeding generations to contain between 54 and 230 repeats. This stage of expansion is called a premutation. People who carry a premutation do not usually ha...
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Hyperactivity is a state of too much muscle activity. This term is also used to describe a situation when a particular portion of the body is too active, such as when a gland produces too much of its particular hormone. See also: Attention deficit...
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Prognathism is an extension of the lower jaw (mandible) that occurs when the shape of the face bones cause the teeth to be improperly lined up (misaligned.
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