The very first division of a fertilized egg primes the resulting cells to seek different fates, influencing the intricacies of a fully developed fetus.
Most of the human body forms from only one of the two cells in a one-day-old embryo, challenging the previous notion of cell homogeneity at early stages of development.
Research challenges the idea of all cells in early embryos being identical; the differentiation process begins early, impacting specialized cell formation.
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