THE first gene to be linked to autism may have been discovered by American
researchers. They think rare mutations in this gene can affect brain
development.
But even if their finding is confirmed, it seems the gene is involved in only
a small proportion of cases. Researchers believe there are at least a dozen
genes involved in autism. Family studies have revealed the rough location of
some of these genes, and teams around the world are hunting down the specific
genes involved.
One team, led by Joseph Piven of the University of North Carolina, has homed
in on WNT2, part…


