blue eyes brown hair

blue eyes brown hairReviewed by michael ellison.This Is Article Aboutblue eyes brown hairBlue Eyes Brown Hair Blue Eyes Brown Hair Blue Eyes Brown Hair Coloring happens because of pigments that are made in specialized cells called melanocytes. Genes control how many melanocytes we have and how much (and what kind of) pigment they make. Changes in any of the genes involved in these processes result in different […]
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blue eyes brown hair 1

Blue Eyes Brown Hair


Blue Eyes Brown Hair




Blue Eyes Brown Hair

Coloring happens because of pigments that are made in specialized cells called melanocytes. Genes control how many melanocytes we have and how much (and what kind of) pigment they make. Changes in any of the genes involved in these processes result in different coloration. Let’s look at MC1R as a classic example. The job of the MC1R gene is to create a protein that turns one pigment, pheomelanin, into a different pigment, eumelanin. Pheomelanin in the pigment that gives people red hair and eumelanin gives the other colors. So when MC1R is working well, people do not have red hair because their pheomelanin has been turned into eumelanin. But if someone has two copies * of a version of MC1R that does not work well, he or she end up with a build up of pheomelanin. And red hair. Other genes affect other aspects of coloration. Some like OCA2 are involved in making pigment. Some versions of OCA2 make lots of pigment and so someone has brown eyes. Other versions of OCA2 make very little pigment and so result in blue eyes. Different combinations of different versions of the genes identified in this study lead to different amounts (and kinds) of pigments. And different trait combinations. So a redhead with freckles and brown hair has one set of versions of these genes. And a blue eyed, blonde haired European has a different set. And… To better understand what this all means, let’s give a few examples and see if we can figure out what genes these folks might have. Remember, this is based on what we know right now. We may be missing a lot of genes that could be involved as well. Red hair, fair skin, freckles, green eyes Someone with this combination most certainly has two copies of the MC1R gene that lead to red hair, freckles, and fair skin. The green eyes mean that he or she has the not-brown-eye version of OCA2 and the green version of either SLC24A4 or TYR gene. Brown hair, darker skin, freckles, and blue eyes Someone with this set of traits most likely has the freckle version of the TYR gene. These folks tended to have darker hair and skin with freckles. The blue eyes almost certainly come from a certain version of the OCA2 gene. And probably a certain version of TYR or SLC24A4 that keeps green eyes away Blonde hair, blue eyes, fair skin with no freckles There are a number of possibilities here. It may be that this person has a certain version of OCA2 that causes all of these traits. Or it could be a combination of OCA2 and KITLG. Or OCA2 and SLC24A4. The study done here has certainly taken a huge step in finding the DNA regions involved in the lighter color of many Europeans. The next step will be to look harder at these regions to confirm which genes are really involved. And to look at more DNA differences to find DNA regions they may have missed. Perhaps soon scientists will be able to generate a picture of a crime suspect with just the DNA he or she left behind! *We have two copies of most of our genes. And each of these genes comes in different versions. Most of the wonderful diversity around us comes from mixing and matching these different gene versions. The genes identified here are no different. More Information Pigments are made inmelanocytes like this one.
blue eyes brown hair 1

Blue Eyes Brown Hair

Coloring happens because of pigments that are made in specialized cells called melanocytes. Genes control how many melanocytes we have and how much (and what kind of) pigment they make. Changes in any of the genes involved in these processes result in different coloration. Let’s look at MC1R as a classic example. The job of the MC1R gene is to create a protein that turns one pigment, pheomelanin, into a different pigment, eumelanin. Pheomelanin in the pigment that gives people red hair and eumelanin gives the other colors. So when MC1R is working well, people do not have red hair because their pheomelanin has been turned into eumelanin. But if someone has two copies * of a version of MC1R that does not work well, he or she end up with a build up of pheomelanin. And red hair. Other genes affect other aspects of coloration. Some like OCA2 are involved in making pigment. Some versions of OCA2 make lots of pigment and so someone has brown eyes. Other versions of OCA2 make very little pigment and so result in blue eyes. Different combinations of different versions of the genes identified in this study lead to different amounts (and kinds) of pigments. And different trait combinations. So a redhead with freckles and brown hair has one set of versions of these genes. And a blue eyed, blonde haired European has a different set. And… To better understand what this all means, let’s give a few examples and see if we can figure out what genes these folks might have. Remember, this is based on what we know right now. We may be missing a lot of genes that could be involved as well. Red hair, fair skin, freckles, green eyes Someone with this combination most certainly has two copies of the MC1R gene that lead to red hair, freckles, and fair skin. The green eyes mean that he or she has the not-brown-eye version of OCA2 and the green version of either SLC24A4 or TYR gene. Brown hair, darker skin, freckles, and blue eyes Someone with this set of traits most likely has the freckle version of the TYR gene. These folks tended to have darker hair and skin with freckles. The blue eyes almost certainly come from a certain version of the OCA2 gene. And probably a certain version of TYR or SLC24A4 that keeps green eyes away Blonde hair, blue eyes, fair skin with no freckles There are a number of possibilities here. It may be that this person has a certain version of OCA2 that causes all of these traits. Or it could be a combination of OCA2 and KITLG. Or OCA2 and SLC24A4. The study done here has certainly taken a huge step in finding the DNA regions involved in the lighter color of many Europeans. The next step will be to look harder at these regions to confirm which genes are really involved. And to look at more DNA differences to find DNA regions they may have missed. Perhaps soon scientists will be able to generate a picture of a crime suspect with just the DNA he or she left behind! *We have two copies of most of our genes. And each of these genes comes in different versions. Most of the wonderful diversity around us comes from mixing and matching these different gene versions. The genes identified here are no different. More Information
blue eyes brown hair 2

Blue Eyes Brown Hair

Coloring happens because of pigments that are made in specialized cells called melanocytes. Genes control how many melanocytes we have and how much (and what kind of) pigment they make. Changes in any of the genes involved in these processes result in different coloration. Let’s look at MC1R as a classic example. The job of the MC1R gene is to create a protein that turns one pigment, pheomelanin, into a different pigment, eumelanin. Pheomelanin in the pigment that gives people red hair and eumelanin gives the other colors. So when MC1R is working well, people do not have red hair because their pheomelanin has been turned into eumelanin. But if someone has two copies * of a version of MC1R that does not work well, he or she end up with a build up of pheomelanin. And red hair. Other genes affect other aspects of coloration. Some like OCA2 are involved in making pigment. Some versions of OCA2 make lots of pigment and so someone has brown eyes. Other versions of OCA2 make very little pigment and so result in blue eyes. Different combinations of different versions of the genes identified in this study lead to different amounts (and kinds) of pigments. And different trait combinations. So a redhead with freckles and brown hair has one set of versions of these genes. And a blue eyed, blonde haired European has a different set. And… To better understand what this all means, let’s give a few examples and see if we can figure out what genes these folks might have. Remember, this is based on what we know right now. We may be missing a lot of genes that could be involved as well. Red hair, fair skin, freckles, green eyes Someone with this combination most certainly has two copies of the MC1R gene that lead to red hair, freckles, and fair skin. The green eyes mean that he or she has the not-brown-eye version of OCA2 and the green version of either SLC24A4 or TYR gene. Brown hair, darker skin, freckles, and blue eyes Someone with this set of traits most likely has the freckle version of the TYR gene. These folks tended to have darker hair and skin with freckles. The blue eyes almost certainly come from a certain version of the OCA2 gene. And probably a certain version of TYR or SLC24A4 that keeps green eyes away Blonde hair, blue eyes, fair skin with no freckles There are a number of possibilities here. It may be that this person has a certain version of OCA2 that causes all of these traits. Or it could be a combination of OCA2 and KITLG. Or OCA2 and SLC24A4. The study done here has certainly taken a huge step in finding the DNA regions involved in the lighter color of many Europeans. The next step will be to look harder at these regions to confirm which genes are really involved. And to look at more DNA differences to find DNA regions they may have missed. Perhaps soon scientists will be able to generate a picture of a crime suspect with just the DNA he or she left behind! *We have two copies of most of our genes. And each of these genes comes in different versions. Most of the wonderful diversity around us comes from mixing and matching these different gene versions. The genes identified here are no different.

Blue Eyes Brown Hair

Blue Eyes Brown Hair
Blue Eyes Brown Hair

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