Through different types of mutations.
Chromosomal
Gene
The genetic variation enable a particular species to withstand the adversities of Nature by way of selection on the basis of the principle of survival of the fittest.
It promotes genetic variation.
They both decrease genetic variation. Stabilizing selection and disruptive selection reduce genetic variation
Sexual Reproduction Genetic mutation
It causes diversity and variation amongst a population
Genetic variation, which can lead to evoloution, and then potentially a new species.
The genetic variation enable a particular species to withstand the adversities of Nature by way of selection on the basis of the principle of survival of the fittest.
Gentic variation is mearsured by the number of species in the given area not.
If a population dwindles, there is low genetic variation and a species may risk extinction.
It promotes genetic variation.
They both decrease genetic variation. Stabilizing selection and disruptive selection reduce genetic variation
When there is low genetic variation in a population the species produced are unlikely to withstand diseases.
As each new generation is produced, genetic variation may be introduced into a population. The more genetic variation in a population, the more likely it is that some individuals might have traits that will be advantageous if the environment changes.
Sexual Reproduction Genetic mutation
Meosis creates gametes (reproductive cells) and allows genetic variation of the species
It causes diversity and variation amongst a population
Genetic Variation is a measure of the genetic differences there are within populations or species. For example, a population with many different alleles at a locus may be said to have a lot of genetic variation at that locus. Genetic variation is essential for natural selection to operate since natural selection can only increase or decrease frequency of alleles already in the population