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Nairobi – The specter of people developing new and strange allergies, indigenous seeds losing their genetic codes and disappearing altogether, farmers making bumper harvests — or no harvests at all — is in the air.

Two weeks ago on July 1, Kenya became the fourth African nation to permit imports of GMO crops, joining South Africa, Egypt and Burkina Faso.

Supporters of the move say it is essential in helping to stabilize prices and feed millions of hungry Kenyans, but matters are not that straightforward.

The online encyclopedia Wikipedia defines a genetically modified or genetically engineered organism (GEO) as one “whose genetic material has been altered using genetic engineering techniques.”

These techniques, generally known as recombinant DNA technology, explains the encyclopaedia, use DNA molecules from different sources, which are then combined into one molecule to create a new set of genes.

This DNA is then transferred into an organism, giving it modified or novel genes. Transgenic organisms, adds Wikipedia, are a subset of GMO organisms which have DNA that originated in a different species.

To put it more clearly, think of an orange with tomato genes. The coming into force of the Bio-Safety Act, 2009 on July 1 that allows the growing and sale of genetically modified crops has elicited mixed reactions.

GMOs are modified in the laboratory to enhance desired traits such as increased resistance to herbicides or improved nutritional content.

But, as expected, anti-GMO lobbyists have kicked up a storm, saying the safety of genetically engineered crops has not been proven beyond reasonable doubt.