There is a difference between GMO and hybrids. Hybrids are just crosses between two different species occuring on every chromosome. Look at it as 1/2 and 1/2 because the hybrid has homologous chromosomes from each parents. GMOs are more like "a dash" or a "sprinkle" of genetic material from outside of the gene pool.
How can I explain this in terms that are easy to understand.
Pure organism A is blue water.
Pure organism B is yellow water. Yea, I know, but I need primary colors.
Hybrid A x B F1 is green, and F2 can be either Yellow, Green, or Blue (or yellow green, green yellow, or any other crayola crayon). So Hybrids are a mix of 2 colors.
Now to make a GMO, take some blue water and modify it. We don't want it to be green, but we want to have a trace amount of yellow in it. What to do we do? We use an eye dropper to get the yellow from the yellow and add it to the blue. How is this done? The "dropper" are bacteria plasmids that are cut with restriction enzymes and cultured in laboratories and then removed and after the bacteria reproduce, the restricition enzymes can then be used to obtain the DNA from the plasmid. Then this strand of DNA is switched into the host cell of the GMO again by our restriction enzymes. Now this strand of DNA can be transcribed, translated, and expressed as protein, but it does not affect the organism like being a hybrid does.
As for making them sterile, if you can use restriction enzymes to add new DNA, you can use it to remove it from sex chromosomes and render them infertile. Corn, wheat, and some domestic food animals are GMOs, I just can't remember what they are. GMOs are good, but the EU doesn't like them. Their DNA isn't going to mess up our DNA and make us GMOs, but if we could find a way to make modify a cancer resistant gene, an influenza resistant gene, solve lots of other problems, then I'm all for that. You aren't making Frankensteins, and you aren't hurting the fish.
To the person that said they could hurt the wild population, they are GLO fish. They don't stand a chance agaist predators!
