When scientists clone a gene, they isolate and make exact copies of just one of an organism's genes. Cloning a gene usually involves copying the DNA sequence of that gene into a smaller, more easily manipulated piece of DNA, such as a plasmid. This process makes it easier to study the function of the individual gene in the laboratory.
To me a deep thinker is someone who is an innately curious, and deeply insightful. He/she has a profound understanding of the right questions to ask in the face of both reality and the unknown. He/she is not afraid to see reality and what is there before him/her.
That there's more beneath the surface, like hidden depths. When a person is deep it means they're always thinking about unusual different stuff like how did we get here, how humans interact, emotions, meanings in things. A person who isn't deep wouldn't think about stuff like this. Its's almost like they're sucked into the fake work of consumerism, society etc... I'm a very deep person and sometimes I wish i wasn't as deep people are always in their heads and it can be depressing - especially when you can't help but think and acknowledge the state of the world.