Colorblindness

       Why are men more likely than women to be colorblind?              
     
     First of all, I would like to tell you a bit about what colorblindness is.  It is usually a sex-linked trait that makes it so that some people can't see certain colors.  (Rarely, for us humans of Earth, no colors at all!)

     Now I will give the answer to why men are more likely than women to be colorblind.   
     Well, colorblindness is carried by the X chromosome and not the Y chromosome.  Women have two X chromosomes (XX) whereas men only have one X chromosome and one Y chromosome (XY).  This means that a woman can be a carrier and not actually get colorblindness because the other X chromosome can "mask" the colorblindness from the other X chromosome.  Since men have one X and one Y chromosome, they don't have another X chromosome to "mask" the colorblindness.  
     
     In order for a woman to inherit colorblindness she would have to get it from both of the two parents.  For a man, he would only need to inherit it from one parent.
    
     These are the interesting reasons why men are more likely than women to be colorblind.
     
     Thank you very much for taking the time to read this, and please let me know what you think!