Magic * Me
I heard someone say it is. Like, if a people's been starved through generations or something their kids begin to have red hair and something. That true?
Answer
Not at all lol.
Red hair appears in people with two copies of a recessive gene on chromosome 16 which causes a mutation in the MC1R protein.
Red hair can originate from several changes on the MC1R-gene. If one of these changes is present on both chromosomes then the respective individual is likely to have red hair. This type of inheritance is described as an autosomal recessive mode of inheritance. Even if both parents do not have red hair themselves, both can be carriers for the gene and have a redheaded child.
In rare cases red hair can be associated with a disease or genetic disorder.
In cases of severe malnutrition, normally dark human hair may turn red or blonde. The condition, part of a syndrome known as kwashiorkor, is a sign of critical starvation caused chiefly by protein deficiency, (melanin found in protein is what genetically determines hair color, so a deficiency in protein would lead to a loss of eumelanin, which is an amino acid responsible for making hair and skin darker) and is common during periods of famine. (This is probably what you are referring to. this does Not happen genetically or change a persons genetics. It is the direct result of loss of protein due to starvation. It would not be carried on through generations.)
One variety of albinism (Type 3, aka rufous albinism), sometimes seen in Africans and inhabitants of New Guinea, results in red hair and red-colored skin.
Red hair is found on people lacking pro-opiomelanocortin.
Not at all lol.
Red hair appears in people with two copies of a recessive gene on chromosome 16 which causes a mutation in the MC1R protein.
Red hair can originate from several changes on the MC1R-gene. If one of these changes is present on both chromosomes then the respective individual is likely to have red hair. This type of inheritance is described as an autosomal recessive mode of inheritance. Even if both parents do not have red hair themselves, both can be carriers for the gene and have a redheaded child.
In rare cases red hair can be associated with a disease or genetic disorder.
In cases of severe malnutrition, normally dark human hair may turn red or blonde. The condition, part of a syndrome known as kwashiorkor, is a sign of critical starvation caused chiefly by protein deficiency, (melanin found in protein is what genetically determines hair color, so a deficiency in protein would lead to a loss of eumelanin, which is an amino acid responsible for making hair and skin darker) and is common during periods of famine. (This is probably what you are referring to. this does Not happen genetically or change a persons genetics. It is the direct result of loss of protein due to starvation. It would not be carried on through generations.)
One variety of albinism (Type 3, aka rufous albinism), sometimes seen in Africans and inhabitants of New Guinea, results in red hair and red-colored skin.
Red hair is found on people lacking pro-opiomelanocortin.
Is red hair an example of incomplete dominance?
Daphne
This seems very likely. In 1999, a geneticist studied this phenomena very closely. He observed a family where both the mother and the father (P generation) had blond, and four children. The three children inherited the blond hair, except the youngest who inherited the red hair.
This phenomena isn't explained in Mendel's laws of inheritance. He only mentioned that two alleles seperate during gamete formation and t hen combine.
Very strange.
Answer
In this case, blond could be dominant over red, so if the parents were both Bb, there could be a BB, Bb, Bb, and bb offspring, which would result in 3 complete dominance blondes and one totally recessive redhead. If what I remember is true, blond is totally dominant over red in human hair color.
In this case, blond could be dominant over red, so if the parents were both Bb, there could be a BB, Bb, Bb, and bb offspring, which would result in 3 complete dominance blondes and one totally recessive redhead. If what I remember is true, blond is totally dominant over red in human hair color.
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Title Post: Is red hair really a sign of persistent starvation?
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Rating: 92% based on 976 ratings. 5 user reviews.
Author: Yukie
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