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Redheads have a particularly high abundance of pheomelanin, with very little eumelanin, which ranges from brown to black. When it's activated, it causes melanocytes to specifically produce eumelanin over phenomelanin, which balances out an individual's ratio.

Contrastingly, redheads are born with a genetic variant that causes MC1R to chemically function differently on melanocytes, which leads to less eumelanin and more pheomelanin production.

These genetic variants are recessive, meaning in order to be born a redhead, either non-redhead parents are carriers 25 percentor one parent is a redhead and the other is a carrier 50 percent ; or both parents are redheads almost percent. This makes Girl with red hair blue eyes nude rare and unique both on the outside and inside. Red hair occurs naturally in one to two percent of the human population, while just 17 percent of the world's population has blue eyes.

The majority of redheads have brown, hazel, or green eyes. In a studyredhead patients required 20 to 30 percent more anesthetic than other women to reach the same level of sedation.

The same experiment was also replicated with mice, which found animals with a MC1R mutation also required more sedation. The genetic mutation could affect the activity of endorphins, known as the body's natural painkillers, which may lead to an increase in pain. Five fast facts about redheads, from bruising easily to being left-handed, that you probably didn't know.

Photo courtesy of Pexels, Public Girl with red hair blue eyes nude. Gingers are more likely to be sensitive to cold and hot sensations than people with different hair colors. It's believed MC1R may cause the temperature-detecting gene to become over-activated, making redheads more cold.

They have normal blood counts and coagulate blood like others, yet a study found they bruise more easily. Researchers suspect people who always bruise excessively may assume this is normal, because they've experienced it often. However, people who bruise only rarely may become concerned about a single bruise linked with minor trauma. Similar to having red hair, left-handedness is a recessive traitwith an estimated 10 Girl with red hair blue eyes nude 12 percent of people being lefties.

Recessive traits tend to come in pairs, which suggests why a lot of redheads are also left-handed.


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