Genetic Diversity

• Genetic Diversity is the number of different variety of alleles in a population
• Natural Selection leads to evolution, changes in allele frequency to be better adapted to the environment
• Adaptations can be Anatomical, Physiological and Behavioural
• Natural Selection occurs from mutation in DNA bases creating new alleles, this can increase survivability allowing reproduction and passing on advantageous allele, increasing allele frequency over generations
• Directional Selection is when one of the extremes has selective advantage due to change in the environment
• Stabilising Selection is when the model trait has selective advantage due to no change in environment, standard deviation reduces
• Disruptive Selection is the high frequency of 2 alleles causing a polymorphism, leading to speciation