Am i right or wrong about the trait for colorblindness being located on the X chromosome...?

Question

i am a girl and i am colorblind...whoaaaa!!! and all these idiots keep saying "girls cannot be colorblind because the trait is on the Y chromosome and girls dont have a Y chromosome" and just want to clarify with someone who knows what their talking about...

and those who dont agree with me...it is possible for females to be color blind when their dad has colorblindness and their mother has a recessive trait for colorblindness!!

someone PLEASE prove me right!!!

Answer 1

Yes, you are right.  Males are much more likely to be colorblind, but women can be colorblind, too.  Males have a greater chance of being colorblind because they receive only one X chromosome.  Females receive two X chromosomes, so as long as one of them is "normal," she won't express colorblindness.

Answer 2

You are right. Im not sure about the science, but my friend is colour blind and she's a girl ^_^

Answer 3

Yes, the genes that control colour vision are on the X chromosome and you need at least one normal gene to have normal colour vision.  This means that colourblindness is an "X-linked recessive" disorder,

Girls have two X chromosomes and boys have an X and a Y.  So if a girl gets a defective X from one parent and a normal X from the other, she will have normal colour vision.  A boy only gets one X chromosome and he gets it from his mother.  If it is defective, then he will be colourblind.

A colourblind father gives a defective X to his daughters and a Y to his sons.   So his sons won't inherit his colourblindness but his daugters will have at least one defective X.  If, like you, a girl has a colourblind father and a mother with at least one defective X, then she has will get one defective X from her father and has a 50/50 chance of getting a second defective X from her mother.   With two defective Xs, she will be colourblind.

Answer 4

Well actually, the truth is exactly the opposite of what your friends say. The color blindness gene is indeed located on the X chromosome, meaning that there's a much higher chance of girls getting it, since they have two X chromosomes, while boys have only one. That is why a lot less boys are colorblind. You can look up color blindness in wikipedia, the article there is very enlightning :)