Can’t differentiate close shades of colors?
My father is colorblind on 3 different spectrums (I’m not sure how many spectrums there are, but that’s what he says was his diagnosis) and I’ve learned that colorblindness can’t be passed from father to son. However, I’ve come to notice that I have a very hard time differentiating between close shades of just about any color. My girlfriend even likes to test it with a game of “are these different?” With paint shades when we go to the hardware store. I’m just wondering if there’s a name for this or if it’s possible I actually am colorblind even though my father is.
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Red-green colorblindness would be from a defective X chromosome inherited from your mother.
Yellow-blue colorblindness is autosomal, and you could have inherited a defective allele from your father.
Your partial colorblindness could be genetic (defective allele from Dad) and/or developmental (somewhat skewed populations of the different cone cells, or maybe not enough vitamin A in your diet).
There are plenty of online colorblindness tests, but they are heavily dependent on the brightness, contrast, tint, and gamma settings of your video card and monitor. If you're thinking about taking some, have your girlfriend take them first to be sure it's not just your video card and monitor settings that are messed up.
Most people have 3 pigments that are color sensitive in the cone cells in their eyes (colorblind people have fewer than 3 or none at all). These 3 different pigments are sensitive to red, green or blue light. Each type only react to one particular color of light. The signals from these 3 different color receptors (each located in different cone cells) are processed by the brain to give us the ability to perceive millions of colors. A weak red signal plus a strong green signal plus a medium strength blue signal would give one color for example. If you are not colorblind then you should have all 3 kinds of color receptor cells. If you perceive fewer shades of color, it may be because your girlfriend has the rare ability to perceive more shades of colors than you do.
The genes for the color receptor cells are located on the x chromosome. Since your father cannot pass on his x chromosome to you unless you are a female, you did not inherit any colorblind genes from your father if you are male. People who have normal color vision with 3 color receptor types are known as trichromatic. Birds have 4 color receptor types, and they are known as tetrachromatic. Tetrachromatic animals and people can perceive more shades of colors than we can or they can see colors in the ultraviolet but we cannot. Even though most humans are trichromatic, there are some women who have a 4th color receptor due to a mutation, and they are tetrachromatic. They can see more shades of colors than trichromatic people can. Therefore before you conclude that you perceive fewer shades of colors than other people, may be you should figure out whether your girlfriend is a tetrachromatic individual and she simply sees more shades of colors than most people do. For example, you can use your girlfriend's experiment on other people and see if they can see more shades of colors than you can. If she is not tetrachromatic, then you may see fewer shades of color because of some anomaly.
you say you cant be colorblind because your faather is ..
that is a false statement..
your father got his colorblindness from the X chromosome from his mother..
you could also have gotten the gene from your mothers X chromosome
that means definitely you can be color blind .. but it has nothing to do with your father as he provides either and x or a y chromosome since you are a male .. I am assuming you ae male .. then your father provided a Y CHROMOSOOME
IF YOU WERE FEMALE THEN YOUR dad would havepassed a X chrome