0_Wizard
i like red hair but its rare, it  occurs naturally in 1–2% of the human population.
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.
Red
Red is the colour at the end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy. The red sky at sunset results from Rayleigh scattering, while the red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide.
Human
Modern humans ("Homo sapiens", ssp. "Homo sapiens sapiens") are the only extant members of the subtribe Hominina, a branch of the tribe Hominini belonging to the family of great apes. They are characterized by erect posture and bipedal locomotion; high manual dexterity and heavy tool use compared to other animals; and a general trend toward larger, more complex brains and societies. Early hominins—particularly the australopithecines, whose brains and anatomy are in many ways more similar to ancestral non-human apes—are less often referred to as "human" than hominins of the genus "Homo". Several of these hominins used fire, occupied much of Eurasia, and gave rise to anatomically modern "Homo sapiens" in Africa about 315,000 years ago.
Human overpopulation
Human overpopulation (or population overshoot) occurs when the ecological footprint of a human population in a specific geographical location exceeds the carrying capacity of the place occupied by that group. Overpopulation can further be viewed, in a long term perspective, as existing if a population cannot be maintained given the rapid depletion of non-renewable resources or given the degradation of the capacity of the environment to give support to the population. Changes in lifestyle could reverse overpopulated status without a large population reduction. The term "human overpopulation" refers to the relationship between the entire human population and its environment: the Earth, or to smaller geographical areas such as countries.
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.
Red Horn
Red Horn is a culture hero in Siouan oral traditions, specifically of the Ioway and Hocąk (Winnebago) nations. He has different names. Only in Hocąk literature is he known as "Red Horn" ("Hešucka"), but among the Ioway and Hocągara both, he is known by one of his variant names, "He Who Wears (Man) Faces on His Ears". This name derives from the living faces on his earlobes (Hocąk), or earbobs that come to life when he places them on his ears (Ioway). Elsewhere, he is given yet another name, "Red Man" ("Wąkšucka"), because his entire body is red from head to toe. Red Horn was one of the five sons of Earthmaker, whom the Creator fashioned with his own hands and sent to earth to rescue humanity.
1_Apprentice
Why do they have red hair?
0_Wizard
i have read that It occurs more frequently (2–6%) in people of northern or western European ancestry,
It occurs more frequently (2–6%) in people of northern or western European ancestry, and less frequently in other populations.
chosen_Red_hair_0
Red hair
chosen_topic_0_Red_hair
Afro-Brazilians
Afro-Brazilians (; ) is a term used in the 21st century by some in Brazil to refer to Brazilian people with African ancestry. The term does not have widespread use in Brazil, where social constructs and classifications have been based on appearance. People with noticeable African features and skin color are generally referred to (and they identify) as "negro" or "preto" ("black"). Many members of another group of people, multiracial Brazilians, or "pardos", also have a range of degree of African ancestry. Preto and pardo are among five color categories used by the Brazilian Census, along with "branco" ("white"), "amarelo" ("yellow", East Asian) and "indígena" (Amerindian).
White Brazilians
White Brazilians ( ) refers to Brazilian citizens of European or Levantine descent. According to the 2010 Census, they totaled 91,051,646 people, and made up 47.73% of the Brazilian population. The main ancestry of white Brazilians is Portuguese, followed by Italian, Spanish, German, and other German-speaking nationalities (Austrian, Swiss, Luxembourger and Volga German) Slavic (Polish, Ukrainian, Russian etc), Levantine, Dutch, French and Baltic. The white Brazilian population is spread throughout the national territory, but its highest percentage is found in the three southernmost states, where 79.8% of the population has European or Caucasian phenotype, whereas the Southeast region has the largest absolute numbers.
White Latin Americans
White Latin Americans or European Latin Americans are Latin Americans who are considered white, typically due to European, or in some cases Levantine, descent. Latin American countries have often encouraged miscegenation, and even a small amount of European ancestry could entail significant upwards social mobility. People descended from European settlers who arrived in the Americas during the colonial and post-independence periods can be found throughout Latin America. Most of the earliest settlers were Spanish and Portuguese; after independence, the most numerous immigrants have been Spanish and Italians, followed by Germans, Levantine Semites, Poles, Irish, British, French, Russians, Belgians, Dutch, Scandinavians, Ukrainians, Hungarians, Croats, Swiss, Greeks, and other Europeans.
Genetic studies on Jews
Genetic studies on Jews are part of the population genetics discipline and are used to better understand the chronology of migration provided by research in other fields, such as history, archaeology, linguistics, and paleontology. These studies investigate the origins of various Jewish populations today. In particular, they investigate whether there is a common genetic heritage among various Jewish populations. Studies of autosomal DNA, which look at the entire DNA mixture, show that Jewish populations have tended to form relatively closely related groups in independent communities, with most in a community sharing significant ancestry and up to 75% Levantine genes.
Multiracial Americans
Multiracial Americans are Americans who have mixed ancestry of "two or more races". The term may also include Americans of mixed-race ancestry who self-identify with just one group culturally and socially (cf. the one-drop rule). In the 2010 US census, approximately 9 million individuals, or 2.9% of the population, self-identified as multiracial. There is evidence that an accounting by genetic ancestry would produce a higher number. Historical reasons, including slavery creating a racial caste and the European-American suppression of Native Americans, often led people to identify or be classified by only one ethnicity, generally that of the culture in which they were raised.
White people
White people is a racial classification specifier, used for people of Caucasian ancestry, with the exact implications dependent on context. The usage of "white people" or a "white race" for a large group of (mainly European) populations, defined besides other characteristics by their light skin and contrasting with "black people", Native Americans, "colored" or "persons of color" originated in the 17th century. It was only during the 18th century, that this floating category was transformed in a quasi-scientific system of race and skin color relations. The concept of a homogeneous white race did not achieve universal acceptance in Europe.
Mexicans of European descent
European Mexicans are Mexican citizens of complete or predominant European descent. While the Mexican government periodically conducts racial censuses for "Indigenous Mexicans" and "Afro-Mexicans" it has not conducted a census for European Mexicans for nearly a century. Estimates of this ethnic group as a segment of the country's population range from 9% and 20% according to "The World Factbook" and Encyclopædia Britannica to as high as 47% according to the ENADIS 2010 (National Survey About Discrimination), conducted by the CONAPRED (National Council to Prevent Discrimination) as a mean to address the problems of racism that Mexicans of mainly Indigenous or African ancestry suffer at hands of a society that favors light skinned, European looking Mexicans.
1_Apprentice
What other places apart from Europe?
0_Wizard
well it can appear anywere, Just most commonly in people with two copies of a recessive allele on chromosome 16 
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.
chosen_Red_hair_0
Red hair
chosen_topic_0_Red_hair
Dominance (genetics)
Dominance in genetics is a relationship between alleles of one gene, in which the effect on phenotype of one allele masks the contribution of a second allele at the same locus. The first allele is dominant and the second allele is recessive. For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics. Often the dominant allele codes for a functional protein whereas the recessive allele does not. A classic example of dominance is the inheritance of seed shape in peas.
Zygosity
Zygosity is the degree of similarity of the alleles for a trait in an organism. Most eukaryotes have two matching sets of chromosomes; that is, they are diploid. Diploid organisms have the same loci on each of their two sets of homologous chromosomes except that the sequences at these loci may differ between the two chromosomes in a matching pair and that a few chromosomes may be mismatched as part of a chromosomal sex-determination system. If both alleles of a diploid organism are the same, the organism is homozygous at that locus. If they are different, the organism is heterozygous at that locus.
Mendelian inheritance
Mendelian inheritance is a type of biological inheritance that follows the laws originally proposed by Gregor Mendel in 1865 and 1866 and re-discovered in 1900. These laws were initially controversial. When Mendel's theories were integrated with the Boveri–Sutton chromosome theory of inheritance by Thomas Hunt Morgan in 1915, they became the core of classical genetics. Ronald Fisher combined these ideas with the theory of natural selection in his 1930 book "The Genetical Theory of Natural Selection", putting evolution onto a mathematical footing and forming the basis for population genetics within the modern evolutionary synthesis.
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.
Solid white (chicken plumage)
In poultry standards, solid white is coloration of plumage in chickens ("Gallus gallus domesticus") characterized by a uniform pure white color across all feathers, which is not generally associated with depigmentation in any other part of the body. Color is an important feature of most living organisms. In the wild, color has great significance affecting the survival and reproductive success of the species. The environmental constraints which lead to the specific colors of birds and animals are very strong and individuals of novel colors tend not to survive. Under domestication, mankind has transformed all the species involved which have thus been freed from environmental pressures to a large extent.
Preimplantation genetic diagnosis
Pre-implantation genetic diagnosis (PGD or PIGD) is the genetic profiling of embryos prior to implantation (as a form of embryo profiling), and sometimes even of oocytes prior to fertilization. PGD is considered in a similar fashion to prenatal diagnosis. When used to screen for a specific genetic disease, its main advantage is that it avoids selective pregnancy termination as the method makes it highly likely that the baby will be free of the disease under consideration. PGD thus is an adjunct to assisted reproductive technology, and requires in vitro fertilization (IVF) to obtain oocytes or embryos for evaluation.
Balancer chromosome
Balancer chromosomes are special, modified chromosomes used for genetically screening a population of organisms to select for heterozygotes. Balancer chromosomes can be used as a genetic tool to prevent crossing over (genetic recombination) between homologous chromosomes during meiosis. Balancers are most often used in "Drosophila melanogaster" (fruit fly) genetics to allow populations of flies carrying heterozygous mutations to be maintained without constantly screening for the mutations but can also be used in mice. Balancer chromosomes have three important properties: they suppress recombination with their homologs, carry dominant markers, and negatively affect reproductive fitness when carried homozygously.
1_Apprentice
Can you explain better? Is it hereditary or it had to do with health issues?
0_Wizard
it is hereditary just rare. Red hair varies in hues from a deep burgundy or bright coppe
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.
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.
Red
Red is the colour at the end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy. The red sky at sunset results from Rayleigh scattering, while the red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide.
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.
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.
Auburn hair
Auburn hair is a variety of red hair, most commonly described as reddish-brown in color or dark ginger. Auburn hair ranges in shades from medium to dark. It can be found with a wide array of skin tones and eye colors, but as is the case with most red hair, it is commonly associated with light skin features. The chemical pigments that cause the coloration of auburn hair are frequently pheomelanin with high levels of eumelanin; however, the auburn hair is due to a mutated melanocortin 1 receptor gene in the people of Northwestern European descent and by a mutated TYRP1 gene in the Austronesians, both genes that reduce the melanin production of the hair cells.
Henna
Henna () is a dye prepared from the plant "Lawsonia inermis", also known as hina, the henna tree, the mignonette tree, and the Egyptian privet, the sole species of the "Lawsonia" genus. "Henna" can also refer to the temporary body art (staining) based on those dyes (see also mehndi). Henna has been used since antiquity to dye skin, hair and fingernails, as well as fabrics including silk, wool and leather. Historically, henna was used in the Arabian Peninsula, Indian Subcontinent, parts of Southeast Asia, Carthage, other parts of North Africa and the Horn of Africa. The name is used in other skin and hair dyes, such as "black henna" and "neutral henna", which is derived from specific parts of the henna plant that are harvested at individual times.
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.
1_Apprentice
Those terms seem to ambiguous, can you put it in a lay man's understanding?
0_Wizard
well It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment . that is it pretty much
It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin.
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.
Red
Red is the colour at the end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan. Reds range from the brilliant yellow-tinged scarlet and vermillion to bluish-red crimson, and vary in shade from the pale red pink to the dark red burgundy. The red sky at sunset results from Rayleigh scattering, while the red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide.
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.
Brown
Brown is a composite color. In the CMYK color model used in printing or painting, brown is made by combining red, black, and yellow, or red, yellow, and blue. In the RGB color model used to project colors onto television screens and computer monitors, brown is made by combining red and green, in specific proportions. The brown color is seen widely in nature, in wood, soil, human hair color, eye color and skin pigmentation. Brown is the color of dark wood or rich soil. According to public opinion surveys in Europe and the United States, brown is the least favorite color of the public; the color is most often associated with plainness, the rustic, feces, and poverty.
Labrador Retriever coat colour genetics
The genetic basis of coat colour in the Labrador Retriever (a highly popular breed of dog) has been studied in detail, and found to depend on several distinct genes. The interplay between these genes is broadly used as an example of epistasis. Labrador Retrievers are a popular breed of dog in many countries. There are three recognised colours, black, chocolate, and yellow, that result from the interplay among genes that direct production and expression of two pigments, eumelanin and pheomelanin, in the fur and skin of the dog. The recognized colours are due to two genes, while a third gene affects the range of colouration observed within the yellow Labrador.
Iris (anatomy)
The iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. Eye color is defined by that of the iris. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm. The iris consists of two layers: the front pigmented known as a stroma and, beneath the stroma, pigmented epithelial cells. The stroma connects to a sphincter muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae) which pull the iris radially to enlarge the pupil, pulling it in folds.
Equine coat color genetics
Equine coat color genetics determine a horse's coat color. There are many different coat colors possible, but all colors are produced by the action of only a few genes. The combination of the extension and agouti loci determine the base coat of a horse.Bay is the original "wild type" color of horses. Ancient remains of horses were tested to be of bay base coat color. The Dun test was not available at the time, but those horses were also dun. (EE AA DD)  Red horses were created with a modification of the extension locus. Dominant extension mutated into a recessive form. When the horse is homozygous for recessive extension (or ee), the horse's base coat will be red.