Question

Describe natural selection

Accepted Answer

1. Individuals of the same species vary due to different alleles
2. Predation, disease and competition (ie. for food) creates a struggle for survival
3. Some individuals are better adapted to selection pressure than others.
4. There are differential levels of survival and reproductive success in a population. Individuals with a phenotype that increases changes of survival are more likely to survive, reproduce and pass on genes (especially beneficial ones)
5. greater proportion of next generation inherit beneficial alleles
6. They in turn are more likely to survive,reproduce and pass on their genes
7. Frequency of beneficial alleles in gene pool increases from generation to generation.

Individuals Alleles Survival Beneficial Selection Increases Pass Genes