Zygote Possibilities

• single birth

  • 1 sperm + 1 ovum = 1 zygote

• monozygotic (identical) twins 1/3

  • 1 sperm + 1 ovum = 1 zygote

• dizygotic (fraternal) twins 2/3

  • 2 sperm + 2 ova = 2 zygotes

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