Some women, however, carry the gene but never develop the disease.

Parents usually have no symptoms, but still carry the gene.

If her daughter carried the gene, that meant she did, too.

My brothers don't want to know if they carry the gene for it.

Sometimes parents don't know they carry the gene until their child gets the disorder.

Among the living, at least 25 more carry the gene that causes the disease.

When her daughter has children, they will also carry the gene and develop the illness.

In order for the child to get this disorder both of the parents would had to have carried the gene.

By all reports, she carries genes for intelligence and good health.

But her son's children, although they might carry the gene, won't get asthma.