color-blindness is always something that i have personally been interested in because my mother is color blind, which is a less likely chance described in our book as due to only one normal gene is required for normal color vision. i have also heard the only way that one can inherit this hereditary trait is through the persons father i think this is due the male gender being more likely to have to traits because of the singular chromosome. my mother has a problem with perceiving different hues of blue and normally sees them as black if they are darker or sometimes purples.
My mother has a very hard time finding the hidden picture or numbers found in the Ishihara plate which is known for testing color deficiency, also when there is a hidden object that will pop out at you when looked at a certain way. Theses picture and tests was how she found out that she was color blind. Before knowing that she was color blind she just use to think that she had bad eye sight and use to ask what color things were when things were blues.
this is all described primarly on page 212 in chapter nine