Open AccessNatural selection in a population group of Andaman and Nicobar Islands
Author(s) -
A.K. Kapoor,
Jaspreet Kaur
Publication year - 2012
Publication title -
journal of natural science, biology and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.236
H-Index - 30
eISSN - 2229-7707
pISSN - 0976-9668
DOI - 10.4103/0976-9668.95966
Subject(s) - selection (genetic algorithm) , natural selection , fertility , population , demography , heritability , biology , geography , ecology , index (typography) , total fertility rate , ethnic group , evolutionary biology , artificial intelligence , sociology , world wide web , computer science , family planning , anthropology , research methodology
Natural selection is a continuous process that operates in populations to weed out deleterious genes and preserve the genes that increase the chances of survival, procreation, and multiplication. The fitness of a population group is measured in terms of its differential fertility and mortality. These are the most fundamental events through which the natural selection is operative. Selection intensity, which is a measure of the fitness of a population, is expressed in terms of differential fertility, and differential mortality, assuming that the heritability of fitness is complete and that the birth and death rates are all selective. These indices are influenced by a number of socio-cultural conditions, religious, ethnic, and environmental factors which have been studied by different researchers in different parts of the world, including India.