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Why do females with turner syndrome have a similar incidence of color blindness as males?
Wiki User
∙ 14y ago
Turner Syndrome is a condition where one of the sex chromosomes (X or Y) is missing.
In girls this means that they only have one copy of the X chromosome, the same as men have. Color blindness is a recessive condition coded for by the X chromosome. This means that men only need one copy of the 'color blindness' mutation (as they have one X and one Y chromosome) where as girls would require two (a unmutated form of the gene on either X chromosome would mean that it was not expressed due to its recessive nature)
In turners there is only one X chromosome for girls, this means that they only require one copy of the mutated gene to express the condition, the same criteria as men
Wiki User
∙ 14y ago
Females with Turner syndrome often have only one X chromosome, which increases the likelihood of inheriting a color blindness gene on that X chromosome. Since males only have one X chromosome, they are more likely to inherit and express color blindness if that X chromosome carries the gene for color blindness.
Wiki User
∙ 13y agoI think it's because like males they only have one X. So that makes them more similar to males. That is only a part of it I'm sure, but that's what I can figure out.
Wiki User
∙ 14y agoyes
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