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Most commonly, color deficiency is genetic. It is passed through the X chromosome, making it more common in males. This is
because when females get a copy of the color blindness gene, there is usually another gene that does not have the gene, and
that one becomes dominant. However, the other gene is recessive, and there is still a chance of it being passed down to their
children. When males get a copy of the color blindness gene however, there is no other gene to dominate it because there is
only one X chromosome instead of the two in the female. Other causes include Shaken Baby Syndrome, accidents to the retina
and brain, UV damage, and the drug hydroxychloroquine (Plaquenil) used to treat rheumatoid arthritis.
This is an example of how color blindness is passed through genetics.
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