Hmm, I think the public needs more education on GMOs and transgenic organism (both plants and animals) in general:
“Asked if tomatoes containing a gene from a fish would “taste fishy” in a question on a 2004 poll conducted by the Food Policy Institute at Rutgers University that referred to one company’s efforts to forge a frost-resistant tomato with a gene from the winter flounder, fewer than half correctly answered “no.”
Putting a fish gene into a tomato plant will not make it “taste fishy” any more than putting human genes into yeast (which I do all the time) turns the yeast cells into human cells.
These types of transgenic (i.e. putting genes from one organism into another) genetic changes can be quite subtle (minor) mainly because of evolutionary conservation of many genes from yeast to tomatoes to fish to humans.
Moreover, a tomato is a tomato because of the complex interactions among all 35,000 or so tomato genes, the millions of regulatory elements in the tomato genome, and of course the interactions between the genes and the environment. A single fish gene implanted in the tomato genome can make only a very small change to the totality of the tomato phenotype (traits).
It is a somewhat complex concept to explain to the General Public (and I don’t think I am very good at it), but it is important because transgenics are and can be very beneficial to humankind.