This is a super-weird result, because it tells us that freckles are a dominant trait, being expressed even when there’s only one copy of the gene in question, but red hair itself is recessive–even though they’re both caused by the same gene. But really, blue eyes are the result of a pretty recent mutation. So it’s sometimes harder than you’d think to say which chin is smooth and which isn’t. It refers to eyes that have multiple colours in them, and you’ve probably heard of it if you’ve seen X Men: First Class; young Professor X calls it “a very groovy mutation.”. I always wished that I had more, probably because a lot of my friends growing up had them. Several recent secular genetic studies have shown that the blue-eye trait existed in the DNA of some of the oldest known humans.
Another gene doing something? I had to have seven eyelashes that were growing in towards my eye removed when I was a kid, which, thankfully, I only have vague memories of now. This narrative is rooted in the belief that modern humans originally evolved from dark-skinned, dark-eyed ancestors from Africa. The secular story maintains that blue eyes are the result of a genetic mutation that occurred in the recent evolutionary history of humans. Over the centuries though, DNA has evolved, changed and mutated, so some of us bear little similarities to our ancestors in regard to things like physical features and height.
It would also say that all blue-eyed people share one single European ancestor. For many years, scientists searching for the origins of blue eyes on the OCA2 gene, but their efforts have not produced any results.
How can this mutation begin? Since humans are around 99.9% genetically identical, it’s amazing to think that such a tiny percentage difference can result in such incredible variation in our species. ), can be found in humans of many different skin colors and people groups and are part of the natural variation built into us by our Creator, who loves variety. While the secular dates for these studies are likely inflated due to the influence of evolutionary presuppositions that permeate archaeology, it’s clear that blue eyes were a common human trait throughout Europe and the Middle East about 4,000 years ago, a time when Earth was being repopulated after the global Flood and the dispersion from Babel. My dad is one of the lucky ones who was born without wisdom teeth. Mutations are found in completely different genes called HERC2. The gene that’s responsible for this is called OCA2, and it controls melanin. It could be that we’re carrying a single redhead gene, makin’ pheomelanin like it’s our jobs. But man, do I ever have a lot of them. Remember a second ago when we were talking about red hair and the MC1R gene? The first thing you gotta know is that blue eyes aren’t technically a color—they’re a lack of color. There are two main types of melanin–eumelanin and pheomelanin. The famous blue-eyed men and women are more charming. But mutations don’t have to be rare—this one now appears in so much of the population that it’s considered a polymorph. Pheomelanin is less common, and it’s what gives red hair and freckles their orangey tone. One day, a nearby gene mutated and started to limit OCA2’s ability to produce melanin in the iris. This is my best picture of how an eye changes from blue to green to hazel, to brown. API/GAMMA/Gamma-Rapho via Getty Images. Central (a different colour radiating out from the pupil). This BiologyWise article provides an understanding of mutations and their effects. If they say “Damn, what’s going on HERE?” then congratulations, and may the spirit of Liz Taylor be with you. Or it could be something else entirely, because this only applies sometimes. That guy is coming back into play again here. Blue eyes aren’t exactly rare! Every human being with blue eyes always has the same mutation. There’s heaps of variation when it comes to size (round dimples, eg: Kirk Douglas, vs Y-shaped clefts, eg: Aaron Ekhart) and depth (very subtle vs very deep). Content © 2020 Institute for Creation Research, Rapid Crystal Growth Supports Flood Model. Blue eyes aren’t exactly rare!
These three categories are pretty fluid, though, and they can combine in weird and wonderful ways. Stanford... Guard what was committed to your trust, avoiding the profane and idle babblings and contradictions of what is falsely called knowledge—by professing... Claims of 100-Million-Year-Old Bacteria Unfounded. Where can we see God’s engineering? Blue Eyes Genetic Mutation: History and Limitation – Recent research shows that humans who have blue eyes have one ancestor. Blue eye color in humans may be caused by a perfectly associated founder mutation in a regulatory element located within the HERC2 gene inhibiting OCA2 expression. These are responsible for hair color, eye color and blood type… Every human being with blue eyes always has the same mutation. It’s also possible to acquire heterochromia, although you probably don’t want to. As things are right now, we aren’t totally sure that this is a mutation, because we’re not sure why wisdom teeth don’t show up (even though it happens in an estimated 35% of the population). Environment? Finally, the researchers found the bright spot by assuming that HERC2 as the cause of blue eyes. Eye colour is determined by pigments in the part of the iris called the stroma, and if there is a tiny amount of pigment there (or none at all), eyes will appear blue. When exposed to UV light, melanocytes produce melanin, which makes skin darker to protect our DNA.
Every blue-eyed person has the exact same mutation. Researchers subsequently discovered that the ‘blue eyes’ mutation is actually in the HERC2 gene, a gene that regulates the activity of OCA2. Blue eyes don't have blue pigment. Hello Giggles is a registered trademark of Meredith Corporation All Rights Reserved. If I wasn’t a writer, I think I’d like to be a genetic researcher. Another recent report described the presence of the trait in the DNA of human remains found in Israel with an alleged age of about 6,500 years.5 In fact, this study also reported that almost 50% of the people in this Middle Eastern population had blue eyes! 2008. The thing that interests me most in the entire world is why people (or characters) are who they are, and what makes them tick. It’s the result of a transcription error on your 16th chromosome, and can also be a symptom of some pretty serious heart-related disorders. Common wisdom—and also Wikipedia—states that this is a primarily dominant genetic trait. Share it!
A really old study (from 1939)recorded that 9.6% of German men and 4.5% of German women had cleft chins. This change successfully submerged the OCA2 gene. If there’s one thing I wish would just die out of the human population, it would be wisdom teeth.
It’s actually the result of a specific genetic program that varies eye color. Epigenetics? Copyright © 2020 Meredith Corporation.
My family hasn’t ever had any redheads in it—we’re generally either dark blondes or have black Irish hair—but I, and a few of my cousins, still have freckles. Anecdotally, this isn’t always the super-gorgeous advantage that it sounds like. Mutation of brown to blue eyes may be representative of both positive and negative mutations. Evidence of the existence of blue-eyed humans can be found in Spain on a skeleton which is 7000 years old.
My left eye is far lighter and more yellow than my right, while my right eye has The Blotch. The Lord has not only shown... Mayflower Pilgrims, Simian DNA, and Straw Men. And one of the things at the very bottom of what makes people tick is in their genes, and I think that’s why I find genetics so interesting. The older individual was believed to have also had dark skin.4. It’s not as obvious on me as it is on some people, because my eyelashes are blonde. Hello Giggles is part of the Meredith Beauty Group. Practically yesterday. Another way to tell is to go to a new eye doctor for a checkup. This mutation results in generally fairer skin, freckles (we’ll get to them), light-coloured eyes, issues dealing with UV light and, recent studies have suggested, a unique pain tolerance.