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The Genetic Disease Color Blindness

465 words - 2 pages

The Genetic Disease - Color BlindnessColor blindness, a condition where sufferers have the inability to distinguish between different colors or shades of color. This disease is an inherited disorder. The most common type of color blindness is genetic red-green color blindness, where the sufferers are unable to distinguish between green and red in dim light. Complete color blindness is a very rare condition, the victims are only able to determine black, white and shades of gray.There are many types of genetic color blindness. For example, people who have the inability to distinguish any color variations have monochromatism, a ...view middle of the document...

The gene that controls the ability to distinguish colors (such as red, green) is found only on the X-chromosome. The dominant allele of this gene produces normal color vision. However, people who have only the recessive allele are color-blind for red and green. The healthy X-chromosome in a woman would override the defectiveness of the other one. It is very unusual for both of the X-chromosome in a woman to be defective. As a result, the son of the woman who carries the gene has a 50 per cent chance of being color-blind. About 8 per cent of men will have a color vision problem. However, the daughter of the woman will not normally be color-blind, unless her mother carries the allele for color blindness and her father is color-blind. Less than 1 per cent of women suffer some form of color blindness.There are no serious effects for color blindness. Many people are often unaware of this disorder, and are usually recognized by people around them who notice their inability to distinguish between different colors or between different color shades. Therefore, color blindness would only really have an impact on people dealing with jobs such as train drivers or pilots. Optometrists and eye specialists can do color vision testing, using specially designed charts to find out whether you are a color blind, and what type of color blindness. Although this inherited disorder is not a serious condition, there is no real treatment for it. Color blindness can neither be cured nor prevented.

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