See Also: fragile X chromosome(medicine)
Fragile X chromosome(health)
chromosome fragile sites(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
fragile(dictionary)
fragile(dictionary)
syndrome, fragile x(medicine)
Fragile site(health)
fragile site(medicine)
Fragile x syndrome(medicine)

fragile X chromosome (medicine)


fragile x chromosome
X chromosome with a fragile site associated with a frequent form of mental retardation. The fragile X chromosome was first sighted by Herbert A. Lubs in 1969. The fragile X is also called FRAXA (the second A signifies it was the first FRAgile site found on the X chromosome). It is due a trinucleotide repeat (a recurring motif of 3 bases) in the DNA at that spot.