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What is the actual reason behind the rotational cleavage that takes place in humans? Why does it happen? If it doesn't occur, what will happen

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closed as off-topic by AliceD, another 'Homo sapien', kmm, David, Bryan Krause Mar 17 '17 at 22:20

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Homework questions are off-topic on Biology unless you have shown your attempt at an answer. For more information see our homework policy." – AliceD, another 'Homo sapien', kmm, Bryan Krause
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