What controls our character is our genes - that is, our DNA.All humans have about 25,000 genes in every DNA molecule and every cell in the whole body, except for the germ cells which have their own DNA in the cell nucleus. Each cell and each gene contains an incredible amount of information.To give your hair cells their special characteristics, several different genes interact and this is what shapes your hair, and affects your hair loss and your hair color.What differentiates the appearance of hair in terms of shape is the “output” of each hair follicle. There are essentially three different shapes — round openings (which produce a straight hair), oval openings (which produce a wavy hair) and very oblique openings (which produce a curly hair) .There can be a mixture of the different openings on the same head. The hair follicle openings may vary slightly giving hair that should be straight a certain waviness.
How does the hair behave when transplanted from one area to another?
To describe it in an easy-to-understand way, let's take an example: people who, for various reasons, want to have denser eyebrows need to do an eyebrow transplant. It involves moving hairs from one part of the body to the eyebrows.On the body, of course, there are no eyebrow hairs to take. An eyebrow transplant is barely different from a hair transplant where we take hair from the neck and move forward to the folds. We almost always also take hair from the neck and insert into the eyebrows.This will look great but the hairs will grow like neck hair, which means that the person will need to cut them continuously so that they do not hang down before the eyes.The hairs are often a little coarser at the neck compared to eyebrow hairs and some hairs may start to grow a little obliquely, but then the hairs go to bud disappears.Over time, some hair can change depending on its surroundings — but this is not obvious. For about 50% of all people who do an eyebrow transplant, within about two years, the hairs will transition to growing more like regular eyebrow hair.The transplanted hair will still need to be cut but will not be as coarse. They will eventually acquire similar character to eyebrow hair.Hair will thus more or less retain its character from the area it was taken. This is because there are stem cells around the hair follicles that are programmed to do a certain job — in this case, to make new hairs grow with a certain character, which is encoded in our genes, and this regardless of where on the body it takes place.
