0_Wizard
red hair is very rare in humans
Red hair (or ginger hair) occurs naturally in 1–2% of the human population.
chosen_Red_hair_0
Red hair
chosen_topic_0_Red_hair
Red hair
Red hair (or ginger hair) occurs naturally in 1–2% of the human population. It occurs more frequently (2–6%) in people of northern or western European ancestry, and less frequently in other populations. Red hair appears most commonly in people with two copies of a recessive allele on chromosome 16 which produces an altered version of the MC1R protein. Red hair varies in hues from a deep burgundy or bright copper (reddish-brown or auburn) through to burnt orange or red-orange and strawberry blond. It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin.
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. The darker a person's natural hair color is, the more individual hair follicles they have on their scalp. 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 associated with ethnic groups. Gray or white hair is associated with age. The Fischer–Saller scale, named after Eugen Fischer and , is used in physical anthropology and medicine to determine the shades of hair color.
Melanocortin 1 receptor
The melanocortin 1 receptor (MC1R), also known as melanocyte-stimulating hormone receptor (MSHR), melanin-activating peptide receptor, or melanotropin receptor, is a G protein–coupled receptor that binds to a class of pituitary peptide hormones known as the melanocortins, which include adrenocorticotropic hormone (ACTH) and the different forms of melanocyte-stimulating hormone (MSH). MC1R is one of the key proteins involved in regulating mammalian skin and hair color. It is located on the plasma membrane of specialized cells known as melanocytes, which produce the pigment melanin through the process of melanogenesis.
List of Anita Blake: Vampire Hunter characters
The following is a list of fictional characters in Laurell K. Hamilton's "" series of novels. The title character, Anita Blake starts as a human with the power of necromancy. She joins the organization Animators, Inc. as an animator: a person who raises zombies) and a vampire executioner. In later volumes, she acquires some powers that are commonly associated with vampires. She contracts the lycanthropy viruses which makes her associate with were-creatures. She also grows powers as a succubus. Bert is the founder and managing partner of Animators, Inc. Over 6 feet tall and built like a former athlete, Bert is an unscrupulous boss who is inclined to sign the animators up for almost any job if the price is right.
Neanderthal
Neanderthals (, also ), more rarely known as Neandertals, were archaic humans that became extinct about 40,000 years ago. They seem to have appeared in Europe and later expanded into Southwest, Central and Northern Asia. There, they left hundreds of stone tool assemblages. Almost all of those younger than 160,000 years are of the so-called Mousterian techno-complex, which is characterised by tools made out of stone flakes. Neanderthals are considered either a distinct species, "Homo neanderthalensis", or more rarely a subspecies of "Homo sapiens" ("H. s. neanderthalensis"). Modern humans and Neanderthals share 99.7% of their DNA and are hence much more closely related than to their closest non-human relative, the chimpanzee (98.8%).
Hair
Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types and hair care, but hair is also an important biomaterial primarily composed of protein, notably alpha-keratin. Attitudes towards different hair, such as hairstyles and hair removal, vary widely across different cultures and historical periods, but it is often used to indicate a person's personal beliefs or social position, such as their age, sex, or religion.
Introduction to genetics
Genetics is the study of genes—what they are, what they do, and how they work. Genes inside the nucleus of a cell are strung together in such a way that the sequence carries information: that information determines how living organisms inherit various features (phenotypic traits). For example, offspring produced by sexual reproduction usually look similar to each of their parents because they have inherited some of each of their parents' genes. Genetics identifies which features are inherited, and explains how these features pass from generation to generation. In addition to inheritance, genetics studies how genes are turned on and off to control what substances are made in a cell—gene expression; and how a cell divides—mitosis or meiosis.
1_Apprentice
Yeah, isn't is only a small percent of the population?