everyone is conjoined twins, it's just that most of us are perfectly joined at the middle so we look like one person
Actually happens to a not insignificant percentage of twins, one of them ends up absorbing the other. This can result in an individual with two sets of genetically different cells (if they were heterozygotic). This is called biological chimerism.
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Actually happens to a not insignificant percentage of twins, one of them ends up absorbing the other. This can result in an individual with two sets of genetically different cells (if they were heterozygotic). This is called biological chimerism.
While it can't occur in humans, some animals can be "twins" split in half right down the middle.
My lil bro ate his twin in utero. I never thought about the fact that he might have two different genetics in there. Hmm..