Introduction
Genetic evolution refers to change(s) in inheritable traits occurring across succeeding generation of organisms. The change (evolution) is responsible for the diversity at all levels including the molecular level e.g. genetic variations, individual organisms in the same species (intra-species variations) and among species (interspecies variations). It is believed that all organisms emanated from common ancestry about 3.7 billion years ago and then evolved over time to the present biodiversity. Therefore all organisms have some shared traits at the morphological and molecular level with the species sharing a more recent ancestry having more similar traits. The process of evolution involves ...
