Best Answer: Chordata refers to the presence of a nerve chord running from the head to the back, which may or may not be accompanied by vertebrae. All animals with backbones are members of the chordate phylum, but not all chordates have bones (lancelets and tunicates are chordates lacking real bones).
Angelman syndrome is a complex genetic disorder that primarily affects the nervous system. Characteristic features of this condition include delayed development, intellectual disability, severe speech impairment, and problems with movement and balance (ataxia).n some people who have Angelman syndrome, the loss of a gene called OCA2 is associated with light-colored hair and fair skin. The OCA2 gene is located on the segment of chromosome 15 that is often deleted in people with this disorder.
Prevelance statistics about Angelman syndrome: The following statistics relate to the prevalence of Angelman syndrome: Angelman Syndrome affects all races and sexes equally in the US (Dr Harry Angelman, Angelman Syndrome Foundation) There are 1000 to 5000 cases of Angelman Syndrome in the US and Canada (Dr Harry Angelman, Angelman Syndrome Foundation)