GENETIC DRIFT

The nature of evolutionary forces

The forces which bring about evolutionary changes by natural selection are called evolutionary forces. These forces are random genetic drift, gene flow and mutation. 1. Genetic drift The change in gene frequencies by chance is called genetic drift. Chance plays an important role in

AND GENE FREQUENCIE

NEW CONCEPT OF EVOLUTION Natural selection operates in two ways: 1 First way: Natural selection at individual level: One way looks at characteristics of individual animals. For example, a bird acquires an adaptation through natural selection. This adaptation permits it to feed more efficiently