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In fact that's what you find.
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This is a picture showing twin pairs of dizygotic twins,
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so twins born same time to the same parents,
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but share half their genetic materials,
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and each panel here shows one pair of twins,
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so this would be one pair, another pair, etc.
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You can really see pretty striking differences
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in--some in height but also in the amount of body fat,
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how-- and also other physical characteristics,
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so you see big differences here, you see big differences here, etc.
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Then if you look at a picture that shows monozygotic twins
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who share all their genetic material