Semi-identical twins

This is interesting. Two ova + two sperm = fraternal twins. One ovum + one sperm + splitting = identical twins. Now there’s a new twist in the tale: two sperm + one ovum + splitting = semi-identical twins.

I’m a little surprised that this hasn’t been described before – perhaps it has for other animals?

In other biology news, a monster cane toad. Who can tell me the error in the first paragraph?

3 thoughts on “Semi-identical twins

  1. Jonathan Badger

    Weird. There seem to be two versions of the story — sometimes I get “poisonous amphibians” which is correct, and sometimes “poisonous reptiles” which is not.

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