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Did you know human sperm and egg are different to other human cells because they have only 23 chromosome that is present in the nucleus?
There are 23 chromosomes in the sperm and there are 23 in the egg and hen those chromosomes combine it adds up to 46 and that is where fertilization starts
And when they are combined the chromosomes make a copy of themself and each new pair are called a pair of sister chromatids. When they finish doing that they line up in the middle of the cell, the sister chromatids are separated to opposite ends of the cell.
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