Genetic variation within a population is measured ... both by the physical environment and by time. Consequently, the definition of populations can be refined to include groups of organisms ...

Genetic inheritance controls the characteristics of all living things. Variation - AQA Variation in species can be generated by genetics. Mutations arise spontaneously and can sometimes lead to ...

Variation is the differences in the characteristics of organisms. It can be caused by the genes an individual inherits or the environment it lives in. Extensive genetic variation is contained ...