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Darwin's Theory Of Natural Selection

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Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in heritable traits of a population over time. Charles Darwin popularized the term "natural selection", and compared it with artificial selection.
1859, Charles Darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. He well-defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved. The concept was simple but powerful: humans best altered to their environments are more likely to survive and duplicate. As long as there is some variation between them and that variation is genetic …show more content…

I think it would be a most extraordinary fact if no variation ever had happened useful to each being's own welfare. In the same way as so many variations have occurred useful to man. But if variations useful to any organic being do occur, certainly individuals thus characterized will have the best chance of being preserved in the struggle for life, and from the strong principle of inheritance they will tend to produce offspring similarly characterized. This principle of preservation. (Maynard Smith, 1993) …show more content…

Genetic is expressed in many physical characteristics namely from eye colour, hair colour, skin complexion. These characteristics of human beings vary from different parts of the world. (Raymond Scupin & Christopher R. DeCorse, 2016:121)
Physical environment is an important factor in human variation. Physical environment may affect the person during his or her lifetime. The Physical environment influence how a group of people live and do their day-to-day activities. Another feature that makes people differ is their culture. This includes the way people talk, dress and what they eat. Culture even goes deeper than that it involves morals, values and customs. (Raymond Scupin & Christopher R. DeCorse, 2016:122).
With the three causes of human variation that I used (genetic factors, physical environment factors and cultural factors) I personally think culture has the greatest effect on human variation because people of a certain culture wear a type of way and you can recognize them from a distance without having a conversation with them or them telling you more about themselves. Culture may influence human genetic variation through religion, marriage, social organization.

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