For genetic engineering, scientists use special techniques to change the DNA of living organisms. Every human being has unique DNA. Strengths of DNA make up our genes. (For more information about DNA, see the topic DNA fingerprints on this website). Scientists take parts of this DNA out and put it into another gene. Scientists are using this technique to get specific features of an organism. They use it for example with food. Genetic modified crops are common these days. The good parts of DNA are gathered so that you get the best quality crop. Of course, this is an easy explanation of a really difficult process. You can’t just randomly gather pieces of DNA you want to put into an organism. You have to follow strict rules, and the DNA has to be in a specific sequence, otherwise you don’t get a organism that can live and function.
To start with, what exactly are stem cells?
There are a lot of ethical disagreements about genetic engineering. This is discussed in more detail in the topic ethical problems.