Cloning a dog doesn't mean they'll be the same.

Popular belief holds that a clone is a perfect copy of the animal. Emory University evolutionary biologist and comparative psychologist Gita Gnanadesikan says that's not how biology works.   

Genetics, environment, and experience cause animal variety. "We often think of DNA as a literal blueprint for the whole organism .

Cloned animals contain roughly the same DNA as the original species, but they may not have the same personality or look.   

The end result will always be at least slightly different," adds Gnanadesikan.  

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The genetic blueprint's appearance and behavior depend on many factors. Small DNA alterations may occur during cloning.  

Natural DNA alterations can occur throughout an organism's development even without genetic manipulation.  

These are generally epigenetic alterations—DNA changes that switch genes on or off. Epigenetic modifications before birth can cause slight color or marking variances in your puppy. 

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