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Colorblindness is an X-linked recessive disorder. What will be the chance of having a colorblind male child to this couple? 0% 25% 50% 100%

Question

Colorblindness is an X-linked recessive disorder. What will be the chance of having a colorblind male child to this couple?

0%
25%
50%
100%

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Solution

To answer this question, we need more information about the genetic makeup of the parents. Specifically, we need to know if the mother is a carrier of the colorblindness gene and if the father is colorblind.

Here are the possibilities:

  1. If the mother is a carrier (XcX) and the father is not colorblind (XY), there is a 25% chance of having a colorblind male child.

  2. If the mother is not a carrier (XX) and the father is not colorblind (XY), there is a 0% chance of having a colorblind male child.

  3. If the mother is a carrier (XcX) and the father is colorblind (XcY), there is a 50% chance of having a colorblind male child.

  4. If the mother is colorblind (XcXc) and the father is not colorblind (XY), there is a 100% chance of having a colorblind male child.

  5. If both parents are colorblind (mother: XcXc, father: XcY), there is a 100% chance of having a colorblind male child.

So, without more information about the parents, we can't definitively answer this question.

This problem has been solved

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