High prevalence of the fra(X) syndrome cannot be explained by a high mutation rate.

Abstract

The overall prevalence of the fragile X [fra(X)] mutation, as determined by population studies, is approximately 1 in 850 [Gustavson et al., 1986; Webb et al., 1986]. This prevalence suggests a very high mutation rate which, in turn, suggests that many patients have to represent sporadic cases. In order to obtain an accurate estimate of the proportion of… (More)

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