(ORDO NEWS) — Geneticists from Germany and the United States conducted a new study in which they studied in as much detail as possible the mutations present in the herb Rezukhovidka Tal.
They found that the plant develops a complete mechanism on its own, with the help of which it protects the most important regions of DNA for it, so that they are not affected by mutations.
In this way they were able to refute one of the theories proposed by Darwin. It says that mutations in a living organism can occur exclusively randomly.
Experts also managed to establish that mutations begin to occur in cases where, for some reason, damaged DNA does not restore its original form, but creates completely new variants.
Darwin’s evolutionary theory states that mutations are a random process, and the most advantageous variants are fixed in the end result.
Since the first half of the last century, this theory has been dominated by the idea that the random occurrence of mutations is a real axiom.
The discoveries made some time ago by a team of experts require a new look at the situation. Scientists noted that earlier it was considered that mutations in plants occur by chance. In fact, they benefit him and appear only when it is really necessary.
The study was carried out at the Max Planck Institute for Biology in Germany. It was there that scientists grew the studied plant samples in the most protected laboratory conditions. Due to this, those plants that had certain defects were able to survive, although in the natural environment, most likely, they would have died.
During the study, a DNA sequencing method was used, which made it possible to establish the presence of over a million mutations. Among them, a certain pattern was noticed.
It was possible to find out that those parts of the genome that affect cell growth, as well as gene expression, undergo mutations only in isolated cases, because they are reliably protected by the plant.
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