The development of body plans in all animals is controlled by a remarkably small number of genes -- and those genes are virtually identical in all animals. Clues came from instances in which the ...

scientists generally assume that the animals are nearly genetically identical. Moreover, Williams had housed the animals in controlled environments with the same diet. Why, then, did the rats ...

a kind of second genome that all animals have, including humans. The epigenome dictates which genes in the genome are turned on and which are not, a process that can differ even between identical ...