Gene therapy is a technique to treat or prevent diseases. Doctors do gene therapy by replacing a mutated gene with a healthy copy, or using a new gene to help fight disease. This could be an alternative to using drugs or surgery. I am against this because it is not proven to be safe and is still being tested. It could be risky and it is only being used for diseases with no other cures. It may be a promising option, but right now it is not completely safe.
Gene Testing is when scientists can find out whether you have a certain disease. They trace it in your family and can tell if you are a carrier.
Cloning is when you get all of the DNA from one parent. The new organism will be an exact clone of the parent.
Designer babies are babies that have traits that are chosen by their parents. The babies could be made smarter, or have certain physical traits.
GMOs are organisms that are genetically modified. GMOs could look better or brighter, but this topic is controversial. These can be dangerous to eat though.