Can girls be colour blind

Answer 1

Yes but it is more likely in males. The reason for this is women have two X chromosomes, and men have one X and one Y chromosome. The gene for color sight is found on the X chromosome. If a woman has a defective gene on her X chromosome, she has another to back it up. If a man has a defective gene on his X chromosome, he does not.

Both X chromosomes have to be defective in the same way for a woman to be color blind, which is the reason why it is so rare. Male colorblindness, on the other hand, is quite common because the gene is not necessary and therefore the people with it don't get weeded out of the Gene Pool. If a necessary gene is defective, you die, and it does not get passed on. It has to mutate again.

Answer 2

I believe a small percentage of women can be colour blind but it is more usual that the female carries the defective gene & passes it on to her male offspring but does not suffer the condition herself. For example, i am colour blind but my mother was not & my mothers brother wasn't either which shows it can from my grand father through my mother to me. If i have a daughter she wont be colour blind but if she has a son then he will be. It seems to skip a generation! Now it's that simple lol. Tom

Answer 3

Girls can be colour blind, but it is very uncommon.

The colour blind gene occurs in the sex linked x-gene. Boys have only one x-gene. Girls have two.

For a boy, if his x-gene is colour blind then he will be colour blind. This occurs about 1 in 20 boys.

For a girl both her x-genes need to be colour blind genes. This occurs far less often, about 1 in 400 in theory.

For a girl to be colour blind, her father MUST be colour blind and her mother must have at least one colour blind gene (which is, by luck, the one she gets). The mother may not be colour blind herself But ALL her sons will be colour blind.

For a boy to be colour blind, the mother must carry the colour blind gene (which is, by luck, the one he gets). The mother may not be colour blind herself. His father contributes the y-gene and has no effect here.

Answer 4

Yeah, but it's rare... Both parents have to carry the gene... The color blind gene is located on th X chromosome, since women have two, even of they carry the gene usually one of them is good and they develop natural eyesight... Colorblindness usually presents with the person not being able to distinguish between reds and greens, in most cases they can see other colors tho...

On a totally cool note, since women do carry two genes for it, occasionally they can develop as what they call tetrachromates... Ok, so most of us have three cones for determining color, tetrachromatic women have four, as a result of the two different genes they received for color vision, and as such they are able to distinguish colors more accurately, or even perceive more colors than the rest of us, it's commonly thought that this color perception difference takes place somewhere in the red to maroon range... It's estimated that 10 percent of women are tetrachromatic, with a very small percentage of those being functioning tetrachromates... It's really hard to test for it though, so accurate numbers are hard to come by... It is suggested tho, that a good place to look would be the mothers of colorblind men, theorizing that a good percentage of them may not be able to pass on a functioning gene to their sons...

Answer 5

the color blindness gene is carried on y chomosome that is only give to a son. daughters have two x chomosomes (one from mom and one from dad), while a son has xy (x from mom and y from dad), so only males can get it.

Answer 6

no

Answer 7

yes