I have hair and it mean i am one of the  1–2% of the human population that have it
Oh really? Is there a huge population of invisible people without hair? 
Well, it appears most commonly in people with two copies of a recessive allele on chromosome 16 which produces an altered version of the MC1R protein. Do you understand my biology terms. 
Of course. However, I take issue with your statistics. If only 1-2% of people have hair, there must be many more people with the dominant allele for hairlessness, yet everyone I see has hair.
For a deeper explanation, Red Hair is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin.
Ah, so I believe there was perhaps a typo in your first sentence. You stated, "I have hair and it mean i am one of the 1-2% of the human population that have it). I believe what you meant was that you are a member of the 1-2% of humans who have red hair, caused by the homozygous recessive gene for red hair found on chromosome 16, thus altering your MC1R protein and giving you a red-haired phenotype.
Human hair color
Hair color is the pigmentation of hair follicles due to two types of melanin: eumelanin and pheomelanin. Generally, if more eumelanin is present, the color of the hair is darker; if less eumelanin is present, the hair is lighter. Levels of melanin can vary over time causing a person's hair color to change, and it is possible to have hair follicles of more than one color on the same person. Particular hair colors are often associated with ethnic groups, while gray or white hair is
Red hair
Red hair (or ginger hair) occurs naturally in one to two percent of the human population, appearing with greater frequency (two to six percent) among people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein.
Red hair varies in hue from a deep burgundy or bright copper (auburn) to burnt orange or red-orange to and strawberry blond. Characterized