Variation is the presence of any differences (genotypic and phenotypic), between
individuals in a population, or between parents and offspring.
Genotypic variation can be due to:
o Random assortment during Meiosis,
o Crossing over during Meiosis,
o Random fertilisation of gametes.
Phenotypic variation can be due to:
o Genetic Factors,
o Environmental Factors,
o Combination of both.
Variation provides organisms with a means of producing new phenotypes.
Variations to the structure or behaviour of an organism may confer a selective advantage
to survive and reproduce
Evolution is the sum of changes of heritable characteristics in population.
It is the development of life in geological time
Natural selection is the process where organisms that are better adapted to their
environment survive and breed.
Those that fail to adapt w