When egg and sperm combine, the new embryo bustles with activity. Its cells multiply so rapidly they largely ignore their DNA, other than to copy it and to read just a few essential genes. The embryonic cells mainly rely on molecular instructions placed in the egg by its mother in the form of RNA.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/X...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/X...