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What are the phenotypes for fragile-x syndrome and down syndrome?

2 doctors weighed in
Dr. Yash Khanna
Family Medicine
1 doctor agrees

In brief: Fragile x syndrome

Fragile x syndrome is x linked dominant condition.
It does not follow usual pattern of inheritance for x linked male carriers pass their premutations to all their daughters.Male cwith full mutation can pass premutation to all their daughters. The females with full mutation are able to pass full mutation on, so therotically there is 50% chance that a child will be affected.Iam sorry but it is littl.

In brief: Fragile x syndrome

Fragile x syndrome is x linked dominant condition.
It does not follow usual pattern of inheritance for x linked male carriers pass their premutations to all their daughters.Male cwith full mutation can pass premutation to all their daughters. The females with full mutation are able to pass full mutation on, so therotically there is 50% chance that a child will be affected.Iam sorry but it is littl.
Dr. Yash Khanna
Dr. Yash Khanna
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