Variation in the beak size of finches is caused by genetic and environmental factors. it is not only controlled by the environment. In order to… Read More »Variation is first divided into environmental and genetical effects
DEFINATION: An adaptive landscape is a surface in multidimensional space (analogous to. a mountain range) that represents the mean fitness of a population (not the fitness of… Read More »Adaptive landscape
Natural selection, Mutation, and Migration all of these directional forces causes change in gene frequency of variants. But apart from these directional forces there is… Read More »Random Genetic drift