<P> The most common cause of color blindness is an inherited problem in the development of one or more of the three sets of color sensing cones in the eye . Males are more likely to be color blind than females , as the genes responsible for the most common forms of color blindness are on the X chromosome . As females have two X chromosomes , a defect in one is typically compensated for by the other , while males only have one X chromosome . Color blindness can also result from physical or chemical damage to the eye , optic nerve or parts of the brain . Diagnosis is typically with the Ishihara color test ; however , a number of other testing methods also exist . </P>
<P> The most common cause of color blindness is an inherited problem in the development of one or more of the three sets of color sensing cones in the eye . Males are more likely to be color blind than females , as the genes responsible for the most common forms of color blindness are on the X chromosome . As females have two X chromosomes , a defect in one is typically compensated for by the other , while males only have one X chromosome . Color blindness can also result from physical or chemical damage to the eye , optic nerve or parts of the brain . Diagnosis is typically with the Ishihara color test ; however , a number of other testing methods also exist . </P>
where does the color blind gene come from
where does the color blind gene come from
on the X chromosome
on the X chromosome