What is the cause of evolution?

Evolution to a geneticist:a change in gene frequencies. Natural selection:a consistent bias favouring some genotypes over others. Evolution can occur in the absence of natural selection, via genetic drift or neutral evolution. Natural selection can stabilize the status quo; zero evolution. read more

The five recognized causes of biological evolution are as follows: 1. mutation. 2. migration also known as gene flow. 3. random genetic drift (small populations) read more

Evolution is the process of genetic change from one generation to the next and may be caused by several methods. In essence, evolution occurs when some individuals or some alleles (gene types) reproduce themselves more than others,increasing their prevalence in subsequent generations. read more