zygote• Zygotes are intrinsically more difficult-yet efficiency clearly has to be much higher, for zygotes are preciouscommodities.• How come, if all were cloned from the same originalzygote?• Each of our body cells, then, is a clone of all the other cells, and of the original zygote.• Then, with luck, all the cells of the animal that develops from that zygote will contain the new gene.• It is the one-celled embryo known as the zygote.• But in the zygote the male and femalegenomesremainseparate until the zygote itself divides.• For the moment, though side by side within the zygote, they are still quasi-independent beings.