A family is described in which X-linked mild to borderline mental retardati
on (MR) is associated with cleft lip/palate. Linkage analysis showed a maxi
mum LOD score of Z=2.78 at theta=0.0 for the DXS441 locus with flanking mar
kers DXS337 and DXS990, defining the region Xp11.3-q21.3 with a linkage int
erval of 25 cM. Am. J. Med. Genet. 85:216-220, 1999. (C) 1999 Wiley-Liss, I
nc.