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Genetics and Inheritance: White Hair

I have a major question about the hereditary genes.

Using Mendelian genetics you can determine the likelihood of your eye color, your hair color, some things that fall in these lines, but at the age of 25 I would like to know how I can determine when I will have a head full of white hair. My father has some white hair and my mother has some, but not as much as I do, so I am guessing that maybe further down the line from the sides of their family that the genetics may lie there that will tell me who the culprit is for my early stages of white headed dom. This has me puzzled since I realize that there may be other factors involved to the whole deal.

Can you help me to clarify this issue?

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Good question. From what I understand the verdict is still out, but in the meantime, here's some useful information that might shed some "white" light on the subject.

Why does hair turn white or grey? Essentially, the hair fibers themselves begin to lack pigment. In other words, the hair follicle that produces that particular hair isn't able to make the pigment for that hair anymore.

Hair gets its pigments much like your skin does -- through cells ...