The region in the long arm (q-arm) of chromosome 7 region 1, band 1, sub-band 23 is known as the Williams-Beuren syndrome critical region (WBSCR) as its deletion causes the Williams syndrome, also known as Williams-Beuren syndrome. This disorder results in having outgoing, and engaging personalities with a tendency to have an extreme interest in other people.
Which of the following statements are true about mutations at the 7q11.23?
A. Some individuals with autism have extra copies of this genetic region.
B. This genetic region has a big impact on social ability.
C. Individuals who have a deletion at this genetic region have Williams-Beuren syndrome, a disease that makes people especially social and outgoing.
D. This genetic region has been identified in all the autism children studied.
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