What are some evolution theories?
Evolutionary theory has taken a long journey since Charles Darwin published the origin of the species in 1859. Before publishing and in direct competition Jean-Bapiste Lamarck announced a well-known incorrect variant of evolutionary theory: Lamarckism or Lamarckian Evolution. Lamarck thought that changes in the body during life could be handed over to ancestors if they were common to both sexes of the species.
For example, his explanation of why the giraffe has a long neck, because the giraffe had the history of its predecessors who tried to get heavier and harder to achieve high leaves on the tree, and therefore the descendants were born with larger necks. It has been shown that this evolution theory is false - the genetic difference between parents and descendants can be completely explained by their genes and requires no reference to the daily life of parents.
The most important theory of evolution is known as a modern synt.Synthesis SIS or Neo-Darwinian, which is a combination of Darwin's natural selection with Mendelian Genetics and Thomas Morgan theory of inheritance. This teOrie is still dominant to this day, with a few small differences.
Mendel, a German monk who lived at about the same time as Darwin, but whose work was not rediscent until 1900, experimented with plants and found alleles concepts (different versions of the same gene), dominant and recessive features and expression of various features are exclusive. Darwin's development and a natural selection are just the idea that life is developing on the basis of random mutations and selective pressures on individuals who are trying to reproduce.
In the sixties, it was necessary to introduce a view of the natural selection of "gene -focused", not independent theory, but rather a remark under the line synthesis. Around this time, some biologists mistakenly thought that individuals were developing qualities for the good of their kind or group.
In order to correct it, it was necessary to give a view of evolution focused on the gene where the organisms of POVuntil "machines for survival" genes, designed for only one purpose of passing on these genes. For example, the gene can choose an organism with a shorter life and a faster reproductive cycle if it chooses evolution. Genes do not care about the well -being of their shell, the organism. This is probably the most sophisticated and latest iteration in the ongoing development of evolutionary theory.