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Types of Albinism
According to the National Organization for Albinism and Hypopigmentation (NOAH), albinism is divided into air jordan 12 xii original og taxi two groups. Oculocutaneous albinism (OCA) involves the eyes, hair and skin, producing the pale skin and aOlernKienOP air jordan retro 6 olympic 2012 white midnight navy varsity red James and W eyes typically affiliated with albinism. Ocular albinism (OA) involves the eyes but does not generally cause the lack of pigment of OCA, although individuals with OA may have lighter skin and hair than other members of their family. OA is less common than OCA.
Recent genetic research has been able to classify further within OCA, and four aOlernKienOP air jordan 17 low white university blue Great Clothing And Jewelry Looks types of OCA are recognized. In general, the four groups of OCA have varying levels of genetic defects of an enzyme called tyrosinase. This enzyme assists tyrosine, its aOlernKienOP air jordan 6 retro black varsity red white Power Rangers amino acid counterpart, in creating pigment. Albinism is a recessive genetic disorder, which means both parents air jordan xx3 white black red must have the defective chromosome in order for their child’s genes to be affected. aOlernKienOP air jordan xx3 white varsity red Walsh commands respect Even if they do aOlernKienOP Air Jordan 4s Can I see your toddler not have albinism themselves, parents carrying the albinism defect have a one in four chance of passing on OCA aOlernKienOP Air Jordan 9s Discount Mens Brown Leather Sandals Perfect Mens Summer Shoes to their children.
The rare aOlernKienOP Air Jordan 9s Cheap Heels Under 20 dollars form of albinism, OA, is also a recessive genetic defect. OA appears aOlernKienOP Nike LeBron 12 Beat Your Opponent With The Right Stuff on the air jordan xi gamma blue black gamma blue varsity maize GPR143 Air Jordan Spizike gene, aOlernKienOP Nike LeBron 11 For Your Safety which controls the pigments of the eye. air jordan 4 iv retro pure money white metallic silver While OCA appears on both X and Y chromosomes, the X chromosome holds the OA air jordan 12 cool grey orange 2012 defect. Melanin and pigmentation exist on almost every chromosome, however, in the genetic sequence, most people air jordan 6 black infrared 2014 black black infrared display albinism on chromosome 11. air jordan 6 rings seattle supersonics Even though scientists have isolated this common chromosome, the complexity of melanin means that most tests are not able to conclusively determine if albinism will aOlernKienOP air jordan 2 retro concord white concord black School Organization appear during a prenatal test.
Parents who have a child with albinism may be able to test for it in later pregnancies. Genetic tests for one child will be similar for siblings, providing genetic researchers more information on where the defect may be located. air jordan 6 vi retro olympic flag During pregnancy, amniocentesis, where amnio fluid is drawn from the uterus, or chorionic villous sampling (CVS) can examine the cells to determine if the air jordan 7 retro dmp bulls magic albinism gene defect is present.