Reproductive Selection

Organisms produce more offspring than can be supported by the available food supply, light, space etc.

Despite this, most populations remain relatively constant in size

Intraspecific competition occurs

All populations have a gene pool

Some individuals have alleles from this gene pool which give them an advantage

More likely to survive

Can obtain the available resources so grow faster & live longer

Only those who successfully reproduce pass on their genes to the next generation

Therefore, the alleles which give the parents an advantage are more likely to be passed on

The new individuals are more likely to survive & reproduce successfully

Causes the frequency of the advantageous allele to increase