Fragile x chromosome

This hereditary x chromosome abnormalities are common causes of lead to children with learning disabilities, and may also cause minor physical anomalies. Incidence of boys is about one-zero, girl is about one-two thousand five hundredth. Not developed symptoms women may carry the defective chromosome, and it will be passed on to their children.
　
Its symptoms include:
　
1, higher than the normal height.
　
2, the head is relatively large.
　
3, mental development delay, of minor girls. Boys will be moderate to severe.
　
4, speech development delay, boy\'s symptoms are usually more serious.
　
5, with features of autism.
　
6, square, a prominent Chin, a long face, large ears. Boy after puberty, testis is especially large. These characteristics, are usually found in children through adolescence to.
　
If parents suspect a child is suffering from the disease, should take the child to the hospital, doctor may pump his blood samples for chromosome analysis, if the test results confirm the chromosome does have flaws, then doctors will provide genetic material, to assess the probability of production exception occurs again.
　
This disease was only recently identified disease by the medical profession, there is no specific treatment, so further research is needed.