According to the Associated Press report, scientists have learnt that the relationship of fruit flies and beer stem from the beer yeast used to produce the beverage.

A recent study puts the mystery to an end that why fruit flies seemed so attracted to the yeasty aroma of beer and even considers the possibility of brewers making use of the pesky little bugs to help create even better beer for human consumption.

The beer yeast generates a chemical aroma that is like the scent of fruit and that attracts fruit flies. The yeast cells are not only giving off the scent for no good reason. Actually, the study showed that the yeast uses the flies to spread itself between locations.

The relationship is like this. To attract fruit flies, the yeast produces a nice fruity smell. The fruit flies eat the yeast to obtain protein and the yeast attaches itself to the fruit flies and is scattered as the flies travel. This shows a commonly useful relationship between the two exists.

According to American Livewire, whole relationship depends on the smell of natural yeast. The flies were unconcerned when scientists made non-fruity mutant yeast.

A new trend among beer-makers called "wild fermentation" allows microbes suddenly colonize the batch to attain a more local flavor. Bioengineer Kevin Verstrepen's research confirms that flies could also be used to choose yeast strains naturally.

Verstrepen say that to choose better yeast strains for brewers he also considers using fruit flies, rather than machines.

He also says that there is possibility that mutually beneficial relationship between flies and yeast has been around for millions of years. Actually, the aroma attraction technique may be the way that other microbes attract a carrier, like a fruit fly, to scatter their cells across an area.