Down syndrome is one of the most common genetic disorder that affects both physical and mental ability. It is caused by a gene problem before birth.Generally a normal person posses 46 chromosomes but a person with Down Syndrome has 47 chromosomes.There are three different types of Down syndrome: trisomy, translocation, and mosaicism. Symptoms include short head,short neck,poor muscle tone, excessive flexibility etc.
Down Syndrome results when each cell in the body possess three copies of chromosome 21 instead of two copies. Extra copies of genes on chromosome 21 results in the disruption of normal function and development of the body which increases the risk of health problems. Down Syndrome occurs when part of chromosome gets attached to another chromosome during the formation of reproductive cells or embryo. Affected people possess two normal copies of chromosome 21 and one extra chromosome that is attatched to other.
Related Journals of Down Syndrome
Journal of Down Syndrome & Chromosome Abnormalities, Genetic Engineering, Stem Cell, American Journal of Medical Genetics, Down Syndrome Research and Practice,International Journal of Down Syndrome, International Medical Review on Down Syndrome, Down Syndrome Victoria, Journal of Intellectual Disability Research, Down syndrome Journals, Faseb Journal, Fetal Diagnosis and Therapy