Tortoiseshell Cats Cannot Be Cloned
courtesy Google Images The ability to genetically engineer food animals, replicate disease free humans and clone your favorite pet have been the fodder for science fiction films as well as for very real debates about the ethical issues attendant when humans create life. There was quite a stir when a man paid $100,000 to a South Korean laboratory for a genetic replica of his beloved dying dog, as the science involved is not perfect and so may dogs are waiting in shelters for homes. Well nature has found a way to thwart science in the case of tortoiseshell cats! These cats will not be cloned! The tortoise color comes from one red gene and one black gene that reside in the cat X chromosomes. Due to a process where the developing embryo cells randomly select and deactivate an X chromosome a cat can be black, red, or tortoise - black and red. There is no set blueprint that governs the cells in this process. The cloning procedure takes DNA from one cell which will have only one color. ...