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Albinism - Term Papers

Albinism

. The word refers to a group of inherited conditions. People with have little or no pigment in their eyes, skin, or hair. Recently a test has been developed to identify carriers of the gene for ty-neg and for other types in which the tyrosianase enzyme does not function. The test uses a sample of blood to identify the gene for the tryrosinase enzymes by its code in DNA. The above test does not apply to to one type of , called X-linked ocular . For X-linked inheritance, the gene for is located on an X chromosome. Females have two X chromosomes, while males only have one X and one Y chromosome. This X-linked accurs exclusively in males. The gene is passed from mothers who carry it to ...

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or recessive trait. In complete , there is lack of pigmentation in skin and hair, as well as in retinal and iris tissue; in incomplete , skin and hair may vary from pale to normal; in ocular , function may vary from norma to impaired. Impairments may involve the retina and iris. If a person has then they usually have somewhere between 20/70 and 20/200 visual. Ty-Neg or also called type 1A results from a genetic defect in an enzyme called tyrosinase. Tyrosinase helps the body to change the amino acid tyrosine into pigment. An amino acid is a building block of protien. is passed from parent to their kid through genes. For nearly all types of both parent must carry an gene to have a child with . Parents may have normal pigmentation but still carry the gene. When both parents carry the gene, there is a one in four chance at each pregnancy that the baby will be born with . This type of inheritance is called autosomal recessive inheritance. Eye conditions common in include: ˇ ...

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Albinism. (2007, April 27). Retrieved December 23, 2024, from http://www.essayworld.com/essays/Albinism/63975

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PAPER DETAILS

Added: 4/27/2007 01:30:27 AM
Category: Science & Nature
Type: Premium Paper
Words: 644
Pages: 3

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