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4 votes

Have there ever been "half-twins" who were halfway between siblings and twins?

Though your question doesn't make sense to me, I believe the answer is Yes. See the following paper about "sesquizygotic" twins: Gabbett, M.T., Laporte, J., Sekar, R., et al. 2019. Molecular ...
theforestecologist's user avatar
8 votes

Have there ever been "half-twins" who were halfway between siblings and twins?

Yes. A case of semi-identical twins was reported in 2006. These twins share 100% of their maternal alleles and 50% for their paternal alleles. It's hypothesized this arose from a double fertilization ...
Darlingtonia's user avatar
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-1 votes

Have there ever been "half-twins" who were halfway between siblings and twins?

Probably, yes. According to this paper, siblings have a mean of 0.50146 relatedness with a standard deviation of 0.03761. This means that this is an event which is 0.25/0.03761 = 6.6471683063 standard ...
BigMistake's user avatar

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