Darwin's Theory Of Artificial Selection

Throughout history there have been many theories about how we came to be and how things “evolve.” By evolve it can be clearly said it is meant as “The process of change over time”(2). And the theory that most people have accepted as truth comes from the thoughts of a man named Darwin. Throughout his life he was greatly influenced by the works of other scientists, however his fascination led him to thinking that they might all be connected and when he made a long voyage he developed a hypothesis about the origin of species. He then presented the Survival of the Fittest theory in which he said that the most fit, or the one with greater ability to produce fertile offspring, will be more likely to survive.

First it is necessary to understand why

As the book says in page 458 artificial selection is when there is a variation provided by nature, and humans select those that they want to keep going. This means that from what already existed humans chose the trait that most benefited them. He then concluded that this must also happen in nature, and he reached the idea of natural selection. “Process why which organisms with variations most suited to their local environment survive and leave more offspring”(2). Here instead of humans being the ones that chose the most favorable traits it was nature that was favoring a trait found in species. An example of natural selection happening is a type of shark. “Sharks are colored white on the underside and blue or gray on the top. This is their camouflage as the top blends with the watercolor to someone looking down into the water and the bottom blends with the light coming through the water from above.”(3). This shows that natural selection if fact is a process that everyone can agree on, as there is enough prove and evidence and it can be tested with similar results. However it has it's limits, as in source (2) it is said that natural selection can only select from previous and already present traits, which would imply that the common ancestor had the traits of every modern living

According to the biology book there are three sources of genetic variation: Genetic recombination during sexual reproduction, mutations, and lateral gene transfer. I don’t think it's reasonable for these to result in evolution, as in sexual reproduction, even though there IS a combination of alleles that is new, there is no new genes. In mutations most are bad, and for there to be enough “good” mutations for a completely different and functional lifeform to be made is crazy to think about. However there is one that does ADD “new” information to the gene pool, lateral gene transfer, but for this to work there had to have been another gene already existing, which would not make sense if biological evolution happened the way the book