williams syndrome?

Question

Is williams syndrome a chromosomal or a genetic mutation? I know that it is caused by the deletion of a part of chromosome 7 (this results in the loss of 20 or more genes) but im not sure whether this is classified as chromosomal or genetic. I believe that it is genetic.

Answer 1

Genetic by what I found and am sending to you. Hope this helps you.
Williams syndrome is a rare genetic condition (estimated to occur in 1/7500 births) which causes medical and developmental problems. ...
http://www.williams-syndrome.org/forparents/whatiswilliams.html