Segregation Blacks 2 South Africa 2 Achankovil river (Kerala) 1 Apartheid 1 Biography 1 Dissertations, Academic (Ph.D) 1 Evolution-genetics 1 Fishes 1 Genetics 1 Habitat 1 Helen Joseph 1 Kerala 1 Mutation 1 Niche (Ecology) 1 Plant Breeding 1 Radicals 1 Scope, methods and applications of genetics 1 Statistics of variation 1 Thesis (Ph.D)-Zoology 1 Variation-genetics 1