For the first 12 hours after conception, the fertilized egg remains a single cell. ... During the first 8 or 9 days after conception, the cells that will eventually form the embryo continue to divide
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When the mrna has done it's job for the celll and is no longer of any use, it starts to degeneate
<span>When a newly formed cell enters into interphase and begins conducting metabolic functions, it is in G1 phase.</span>