Part one of term paper
. 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 tryrosi ...

Part two of term paper
... who carry it to their sons. The mothers have subtle eye changes which an ophthalmogist could identigy, but mothers usually have normal vision. For each son born to a mother who carries the gene, there is one in two chance of having X-linked ocular . The description is a hereditary deficiency pigmentation. This could involve the entire body or part of the body. This is believed to be caused by an enzyme deficiency involving the metabolism of melanin during prenatal development. This can be inhe ...