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.
Keywords: developmental dyslexia; reading disability; linkage analysis; chromosome 2 Developmental dyslexia is a speciï¬c reading disability aVecting children and adults who otherwise possess normal intelligence,cognitive skills, and adequate schooling.1 In 1950, Hallgren2 reported that more than 80% of chil-dren with dyslexia in Stockholm schools had other family members with dyslexia. Subse-