Table 1

Sharing at EN2 locus

Affected sib pairsDiscordant sib pairs
No of sib pairsSharing at paternal allele (%)Sharing at maternal allele (%)No of sib pairsSharing at paternal allele (%)Sharing at maternal allele (%)
All families22551.647.921047.350.9
Useful phrase speech9661.952.6764050
No useful phrase speech12446.542.913151.451.6