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ZanzabumX [31]
2 years ago
12

Red-green colorblindness is a inherited disorder in which individuals have trouble distinguishes

Biology
1 answer:
mariarad [96]2 years ago
5 0

Since the colorblindness is located on the X chromosome, the man must have inherited his colorblindness from his mother.

<h3>X-linked traits</h3>

Women are XX while men are XY.

Also, the X chromosome in XY always comes from the mother.

Since the man is affected for colorblindness but his brother is not, it means that only one X chromosome of the mother is affected while the father can be affected or otherwise.

Assuming the father is free from colorblindness and the allele is represented by c:

          X^cX    x    XY

      X^cX    X^cY    XX    XY

Thus, the man's genotype is  X^cY and it comes from the mother.

More on X-linked traits can be found here: brainly.com/question/9830755

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