Mechanisms of Evolution

Called mechanisms of evolution to a series of natural processes that were initially described by Carlos Darwin, who formulated the theory of evolution.

Essentially it consists of an exchange of alleles where the dominant allele marks the changes in the offspring.

They are different biological-selective mechanisms that produce radical changes in the descendants and are produced by five mechanisms, which are the following:

1. Geographic isolation.
2. Genetic drift
3. Migration
4. Mutation
5. Natural selection
6. Genetic variation

Example of mechanisms of revolution:

1.-Geographical isolation:

Isolation or geographic occurs when for some reason there is a physical barrier that prevents the union of different individuals of the same species, isolation that can be exemplified in a chain of mountains, an island or a desert that prevent the contact and union of living beings similar.

It occurred in ancient times in some populations, which caused the similarities in the Far East to become general, similarities such as slanted eyes and straight hair.

2.-Genetic drift:

Genetic drift is the change produced in the genetic background, which is caused by chance and genetic drift can produce alterations for or against natural selection.

It can be seen in skin color, where the dominant allele can force skin color in subsequent generations, occurs mainly when there is a decrease in the frequency of a favorable or unfavorable gene according to be the case.

3.-Migration:

The migration It is caused when a population goes to another place in search of better environmental conditions, this produces certain changes within the development or certain specific characteristics, such as African migration to the coasts of Mexico or in countries such as France and England.

4.-Mutation:

Mutation is called any genetic change that occurs in an individual, this change can be inherited or go unnoticed.

When the mutation is beneficial it can occur in subsequent generations, changes or mutations such as change color in some pigeons, which go unnoticed by birds, an aspect that they did not have with their color natural.

5.-Natural selection:

Natural selection is that evolutionary process that was explained by Charles Darwin, in which he explains that there are characteristics that are altered by the influence of the environment, are due to direct needs that cause that specific trait to be inherited by the children, a change that is produced in order to improve the condition of individuals and their environment of survival.

It can be seen in the color of the skin, where the skin is strengthened to withstand the rays of the sun or the white skin, which is present in people who develop protection against the cold.

6.-Genetic variation

They are the perceptible differences or markedly different genetic manifestations among themselves, between the individuals of a species.

There are other criteria that establish other procedures in the scientific method along with natural selection:

a) Comprehensive verification.- The so-called exhaustive verification or simulation corresponds to genetic modifications in which in some cases the organisms effects can be directly substituted for components of its structure, and if it is satisfactory in functionality, the mechanism evolution works and if there is no risk or adverse effects, suppression can be carried out without problem, since the objective.

b) Trial and error.- This is considered the simplest of all the methods of evolutionism, it is considered to be present in the microorganisms that have many offspring, is based on mechanisms related to selection natural.

c) Natural selection.- According to Charles Darwin's parameters, this is the most complete method, since the other parameters would have only partial parameters and it is through this method that you can have a total awareness of the phenomenon. This does not detract from the fact that its appreciation would require a lot of time, to the point of turning it into a process based merely on logically supported conjectures and archaeological remains that sustain.

d) Partial verification of modifications.- This is when there are many interrelationships or changes, which means that the check cannot be completed and will always be partial.

e) Inbreeding primary sexual distinction.- In the more complex entities, partial verification is insufficient as it cannot guarantee the viability of the new entities.

f) Verification of transmitted genetic information.- This corresponds to the study of genes, where recessive genes and dominant genes appear. Appearance attributed to Mendel's investigations.