INFOGRAPHIC 14.6 EVOLUTION BY NATURAL SELECTION
In any genetically diverse population, individual fitness varies. When an organism’s environment favors specific genetic variants to survive and reproduce over others, natural selection occurs. Those with high fitness tend to reproduce more successfully. Over generations, the frequency of alleles that confer higher fitness increase while those that confer lower fitness decrease. This non-random change in allele frequencies over generations is called evolution by natural selection.
In any genetically diverse population, individual fitness varies. When an organism’s environment favors specific genetic variants to survive and reproduce over others, natural selection occurs. Those with high fitness tend to reproduce more successfully. Over generations, the frequency of alleles that confer higher fitness increase while those that confer lower fitness decrease. This non-random change in allele frequencies over generations is called evolution by natural selection.
