Filipino Work Values Scale

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Color Blindness by Inheritance RED GREEN COLOR BLINDNESS Red Green Color blindness is predominantly found only in men. The gene that leads to red green color blindness is found in the X Chromosome. Males only have one X chromosome whereas females have 2; typically in females the stronger chromosome takes precedence so they retain correct vision. The son of a woman carrying a faulty gene has a 50% chance of inheriting the faulty X chromosome and as a result – suffering from color blindness. The daughter of the same woman is unlikely to be color blind unless her father is color blind; however she retains a 50% chance of being a carrier for the defective gene. BLUE COLOR BLINDNESS Blue color blindness (often referred to as blue yellow color blindness) is extremely rare, so rare that only 5% of color blind people suffer from it. Unlike red green color blindness, the chance of having blue color blindness is equal in both men and women as the gene is found on a different chromosome ( chromosome 7). This gene is shared equally by men and women and blue color blindness comes from a mutation of this gene. COLOR BLINDNESS BY NATIONALITY One might expect the percentage of affected people to be relatively constant in all countries however this is far from the truth. In most Caucasian societies up to 1 in 10 men suffer, however only 1 in 100 Eskimos are color blind. There is no solid proof as to the cause of this however it is logical to assume that less of the ‘original Eskimos’ carried the defective gene, so the likelihood of it infecting the gene pool was quite a lot lower. DEVELOPED COLOR BLINDNESS Whilst almost all color blindness is inherited, infrequently a change in the chromosome during early development can cause color blindness. Various injuries involving trauma to the eye, and even some diseases can also cause color blindness to develop in a person of any age.

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