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In a family the mother has color blindness and the father has normal vision. Their child has Klinefelter syndrome and normal vision. How is this explained and what gametes did this child give? We assume that the above parents had a child with Klinefelter syndrome and color blindness. How can this happen?

Sagot :

The child can have normal vision if she inherites a healthy X chromosome from the father, for this to happen, the child must be a woman.

If the child is a man, he can have normal vision as he has Klinefelter syndrome, which consist on having an extra X chromosome from his father, giving him normal vision even though the mother can only give him X chromosomes with color blindness. Moreover, this can happen as colour blindness is a recesive trait.

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