We describe a bond having one end slightly positive and the other end slightly negative as being polar. Inductive effects. An atom like fluorine which can pull the bonding pair away from the atom it is attached to is said to have a negative inductive effect.
These genetically modified organisms (GMOs) are designed for many reasons, including: pesticide and disease resistance, drought/frost resistance, increased yields, enhanced nutritional content and as a way to produce drugs or vaccines at low cost on a large scale.
GMOs probably trigger disgust because people view genetic modification as a contamination. The effect is enforced when the introduced DNA comes from a species that is generally deemed disgusting, such as rats or cockroaches. However, DNA is DNA, whatever its source. The impact of disgust explains why people feel more averse towards GM food than other GM applications, such as GM medicine. Once disgust is elicited, the argument that GMOs cause cancer or sterility, or that they will contaminate the environment, becomes very convincing and is often used.