Genetic variation produces new characteristics and, over generations, drives the evolution of species. But how do new gene types arise and what are the processes behind evolution?
- Mutations of DNA are responsible for evolution.
- DNA mutation can be driven by two processes.
- Natural selection - we adapt to our environment to ensure survival.
- Random environmental changes that cause genetic drift.
All evolution with its incredible power to produce adaptations, and new species operates at the genetic level.
Genetic variation produces new characteristics and over generations, some gene types become more common, while others die out.
This is evolution.
Change in gene frequency of a population
But how do new gene types arise?
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