What is the role of genes in the whole series of processes that lead from egg to child? During development and differentiation, how does genetic information work and in what way is it expressed? We will follow the different phases of gestation from the moment the fertilised egg divides in two and the embryo, which at this point is still close to those of vertebrates, attaches itself to the uterus. Little by little, the organism takes shape, the foetus begins to move, the child reacts to sound and the brain continues to develop until birth and much later.
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