Why are sperm cells different if they are all cells from the same parent?
In: Biology
None of the other comments are really answering your question.
Normally, when a cell divides it duplicates it’s DNA so that each resulting cell has a full set of chromosomes. However the division that leads to sperm (and egg) cells is a different process. As others have stated, each resulting cell only have half the chromosomes. But, before the chromosomes split apart, they swap some DNA with each other. This allows the DNA to be mixed up a little, instead of just a clean half.
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