Do you know
One sperm can fertilise only one ovum. If two ova (eggs) leave the ovaries at the same time, and
are both fertilised, 'non-identical twins are born. They are like any two brothers, or any two sisters
or a brother and a sister.
If an ovum splits after it has been fertilised into two 'zygotes', identical twins are formed. This
is because they have the same set of genes (Genes are special structures in the nucleus that are
responsible for different characteristics of a person).
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Awesome. Nice to know
Explanation:
Thanks for that amazing fact
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