Where will you find variation within a species?

Answer 1

variation within species can be found in all the species. The differences we see between individuals in a species are affected by five processes, usually acting in combination with one another:

1. Mutation- these are changes in the genetic structure occurring through breaks in DNA, errors in copying or changes in sequence. This is the ultimate source of all variation.

2. Selection is a force which decreases an individuals ability to reproduce. For example, genetic variation in the ability of a tree species to survive severe drought may cause some individuals to die while others survive and reproduce. An event like this may decrease the overall diversity of genes (alleles) in a population but a change in the overall genetic makeup of the population is produced.

3. Migration is the movement of genes into or out of a population. This includes pollen or seeds blowing into the population from a source that is otherwise considered to be a separate population.

4. Random drift is a chance event unconnected with the genetics of an individual that affects the ability to reproduce. Random drift can be thought of as "dumb luck." A lightening strike or animal damage that kills a tree which is not directly related to the tree's genetic makeup can be thought of as random drift.
5. Nonrandom mating reflects the fact that some individuals in a population are more likely to mate with one another than others in the population. In a forest, a tree's flowers are more likely to be fertilized by nearby individuals.

Answer 2

Human species.