Like most features, hair colour is caused by a combination of your genes and your environment.
The genes involved in determining hair colour have not yet been fully worked out. We know that natural hair colour depends on the amounts of two substances in the hair: eumelanin and pheomelanin.
Blondes have a small amount of eumelanin; brown haired people have a higher level and black haired people have the most.
Pheomelanin determines how red your hair is: the more pheomelanin, the redder it is.
The amounts of these pigments depend on the genes you inherit from your parents, but they can also be changed by your environment eg if you spend a long time in the sun, your hair will bleach.
There are multiple genes that determine a persons skin tone. A white child can be born (rarely) to black parents and vice versa. If two white parents have a black child there must be an African ancestor. If two black people have a white child, the baby will be considered albino.
Genetics! Lets say the alleles for eye color are C and c. Parent A is homozygous dominant for green eyes, so they would have the genotype "CC". Parent B may be Homozygous recessive, meaning they have the genotype "cc". In this case, if you were to draw a Punnett square, you would find that the child would be Heterozygous, and they would end up with green eyes.*Heterozygous-the alleles are different (hetero) one dominant, one recessive. The genotype is "Cc". The child's phenotype ends up with the dominant gene. In order to determine breeding capabilities, create a Punnett square.
it depends where you were born like if you born in Africa your skin would be black because of the sun and heat a bit like a tan.
and that's gods way
by your parents
true
The melanocortin 1 receptor is primarily responsible for skin color.
It is extremely common for humans to have no earlobe to speak of . . . it is hereditary just like eye color or skin color.
Not really. While 2 white people won't have a black baby, and vice-versa, there is no such thing as a dominant and recessive trait for skin color. Skin color is determined by many alleles, which is the reason humans have such a wide variety of skin colors. Some are light, some quite dark, and others have a medium skin tone.
Sunlight (sun's UV radiation) is the major environmental factor that affects skin color in humans. Skin pigmentation (melanin) is responsible for skin color and it evolves primarily to regulate the amount of ultraviolet radiation penetrating the skin.
true
The variations in human skin color is controled by the amount of melanin within the epidermis or outer layer of skin. Albinos, or persons with little or no melanin in their skin, have very pale, pinkish skin, regardless of the skin color of their parents.
Skin color.
Phenotype
The melanocortin 1 receptor is primarily responsible for skin color.
Your skin gets its colour from the amount of melaninpresent in your skin as determined by your genetic makeup, and this comes from your parents.
The amount of melamine in the skin determines the color of the skin.Skin pigmentation is determined by melanin concentrations. Whether an individual is African or Caucasian, there is always melanin involved. (Only albinos lack melanin.)Well, you can have it, olive, brown, peachy yelowy colour black or blue. Blue is Smurfs.
Polygenix Traits
Fair skin and red hair are caused by different genes in modern humans, than they were in Neanderthals.
It is extremely common for humans to have no earlobe to speak of . . . it is hereditary just like eye color or skin color.
The strength of a human is not determined upon the race or skin color. It doesnÕt matter if someone is white, black or brown, to determine strength it takes dedication and working out.
Not really. While 2 white people won't have a black baby, and vice-versa, there is no such thing as a dominant and recessive trait for skin color. Skin color is determined by many alleles, which is the reason humans have such a wide variety of skin colors. Some are light, some quite dark, and others have a medium skin tone.