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Identical twins don't share 100% of their DNA
Jan 7, 2021
livescience.com
0:22
How can identical twins have different sexual orientations? "We have to accommodate all audiences," jokes Douglas Griffiths. Their story now, on Insight | http://bit.ly/1V8p8Sc | SBS INSIGHT
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Jul 18, 2017
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Feb 11, 2019
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1:32
A landmark study tracking 180 identical twin pairs reveals the lifestyle choices that age us from the inside out. 🔎 Why twins? Identical twins have the same DNA. Any visible differences mostly come from environment and habits. 📌 Key findings: • Hormone Levels Matter: Twins on hormone replacement therapy (like estrogen) for years had thicker, more hydrated, more elastic skin — and looked up to 7 years younger than their sisters. • Smoking Ages You Faster: Every decade of smoking added about 2.5
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Twins aren’t just “identical or fraternal.” It’s a little more interesting than that 👀👶👶 There are two main types: 🧬 Identical (monozygotic) → one egg, one sperm → splits into two embryos → same DNA → usually look very similar 🥚 Fraternal (dizygotic) → two separate eggs, two sperm → genetically like regular siblings → can look completely different Here’s what most people don’t know: ⏱️ Timing matters When the embryo splits determines whether twins share a placenta or amniotic sac, which aff
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