How do I find out if I carry the Tourette's Syndrome gene?

My older brother was diagnosed with Tourette's Syndrome when he was about 10 years old, he also has ADHD. We do not know our father or his family's history, and out mother has no idea if anyone in our family has had it. My brother is now 24 and I am 23 years old. I am wondering if any of my future children... show more My older brother was diagnosed with Tourette's Syndrome when he was about 10 years old, he also has ADHD. We do not know our father or his family's history, and out mother has no idea if anyone in our family has had it. My brother is now 24 and I am 23 years old. I am wondering if any of my future children will have the syndrome or how can I get tested to see if I carry it? I have researched about this topic and it seems like no one really knows. If anyone has any info or input for me I would greatly appreciate it.
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