The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.
Developmental dyslexia, or specific reading disability, is a disorder in which children with normal intelligence and sensory abilities show learning deficits for reading.
the basic deficit in dyslexia is actually a deficiency in phonological processing, which is believed to disrupt the acquisition and automation of word recognition and other reading and writing-related skills. In spite of the well known familiar occurrence of dyslexia the genetics of this disorder has been poorly understood. Advances in molecular genetics in the last few years have allowed researchers to identify loci segregating with developmental dyslexia on chromosomes 1, 2, 6, 15 and most recently on chromosome 18. However, the results have been inconsistent in different