Micromutation and natural

I glumly nodded assent.Muller switched on the overhead light and smiled benignly. It was an old story.There was a kind of moth that had adapted to Drosphila genetics laboratories. It was nothing like a fruit fly and wanted nothing to do with fruit flies. What it wanted was the fruit flies’ molasses. In the brief time that the laboratory technician took to unstopper and stopper the milk bottle – for example, to add fruit flies – the mother moth made a divebombing pass, dropping her eggs on the run into the tasty molasses. I had not discovered a macro-mutation. I had merely stumbled upon another lovely adaptation in nature, itself the product of micromutation and natural selection.