Answer:
50%
Step-by-step explanation:
The inheritance of color blindness is determined by a gene located on the X chromosome. Males have only one X chromosome (XY), so they are more likely to inherit the condition if the gene for color blindness is present on their X chromosome.
If a male has the gene for color blindness, all of his offspring will be non-colorblind females (since females have two X chromosomes, one from each parent, and only one copy of the gene for color blindness is required for normal color vision). If a non-colorblind female (who has the normal version of the gene on one X chromosome and a non-functional version on the other) marries a colorblind male, approximately half of their male offspring will be colorblind and half will be non-colorblind.
Therefore, the percentage of their offspring that will be non-colorblind males would be 50%.