Identical twins, despite starting from a single egg split and sharing nearly 100% DNA, are not truly identical because random genetic mutations occur separately in each embryo after the split, and epigenetic changes cause the same genes to switch on and off differently during development, resulting in different fingerprints, disease risks, and even genders.
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Identical twins: the DNA plot twist science just discovered #identicaltwins #dna #epigeneticsAdded:
Identical twins are not identical. And here's what most people get wrong. They start from one egg splitting into two. Nearly 100% same DNA. Most people stop there. But after that split, each twin develops alone. Random genetic mutations happen separately in each embryo. Then epigenetics kicks in. the same genes, but they switch on and off differently inside the womb. Same DNA, different fingerprints, different disease risks, sometimes even different genders. They were never truly identical. So, what does make you uniquely you? Your epiggenome. And it's rewriting itself right now. Next video will be on how your genes switch on and off every single day.
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