Cats and dogs delivered by cloning have the same genes as their donor pets and will be the closest match possible to the donor. This is best described as identical twins born at a later date. The new puppies and kittens will be the same sex as the donor, but just as it is in nature, may have slight phenotypic differences, such as different markings due to natural epigenetic factors. The environment does interact with genetics to impact many traits such as personality and behavior.