According to Colour Blind Awareness, girls can become colorblind if they inherit the colorblind gene from both their mother and father. It is rare for girls to become colorblind, and more men than women are colorblind around the world.
According to Colour Blind Awareness, the gene for colorblindness is found on the X chromosome. Women have two X chromosomes, while men have one X chromosome and one Y chromosome. For males to become colorblind, they only need to inherit one X chromosome with the colorblind gene from their mother. For females to become colorblind, they must inherit two X chromosomes with the colorblind gene on them, which is why it is so rare for women to be colorblind.