Genetics may be defined as the study of the ways in which genes operate and the way in which they are transmitted from parents to offsprings. Modern genetics involves study or the mechanism of gene action - the way in which the genetic material (de-oxyribonucleic acid or DNA) affects physiological reactions with in the Cell. Although genes determine the features an individual may develop, the features that actually develop depend upon the complex interaction between genes and their environment. Normal green plants, for examples have genes containing the information necessary to synthesize the chlorophyll that gives them their green colour and chlorophyll is synthesized in an environment containing light i.e. the gene for chlorophyll is expressed. If the plant is placed in a dark environment chlorophyll synthesis stops i.e. the gene is no longer expressed.[106]
Gene Action
Footnotes