How can i develop my capacity for change?

It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change.

—Charles Darwin

Within evolutionary theory, evolutionary adaptation is defined as a biological mechanism through which organisms adjust to changes in their environment through morphological, physiological, behavioral and molecular modifications, which make them more suitable for their existence. 

In fact, the word indicates this, since the term adaptation comes from the Latin adaptō which means I adjust to. Not all adaptations are completelyvpositive, and for it to be transmitted from generation to generation and persist in the population, reproductive success must be increased.

In addition, there are numerous characteristics of the species that have not been developed to better transmit genetic material and that, therefore, are not adaptations, but are pure coincidences. The following definitions are given by the evolutionary biologist

 Theodosius Dobzhansky:

  1. Adaptation is the evolutionary process whereby an organism becomes better able to live in its habitat or habitats. 
  2. Adaptedness is the state of being adapted: the degree to which an organism is able to live and reproduce in a given set of habitats. 
  3. An adaptive trait is an aspect of the developmental pattern of the organism, which enables or enhances the probability of that organism surviving and reproducing.


REPLICATION

In a universe of blind physical forces and genetic replication, some people are going to get hurt, other people are going to get lucky, and you won’t find any rhyme or reason in it, nor any justice.

—Richard Dawkins

The basic unit of information in living beings is the gene, defined in eukaryotic cells as a segment of DNA that carries the information necessary for the synthesis of a protein or of an RNA. The quantity, size and distribution of genes varies according to the species analyzed. In humans, the number of genes that code for proteins is estimated to be only 3% of DNA; the rest being regulatory and structural sequences.

The understanding of the storage mechanisms and the forms of use of the information has served to clarify many of the unknowns raised about the structure and cell function. The cell carries out this activity through the pathways of genetic information; These pathways constitute the fundamental principle of molecular genetics.

There are three processes called:

  • a) Replication or copying of paternal DNA to form daughter DNA molecules identical to their parent, and identical to each other.
  • b) Transcription or copying of information from a part of DNA to RNA molecules.
  • c) Translation or copying of the genetic information of the RNA to the specific amino acid sequence of a protein.

DNA replication is the process by which a DNA molecule is duplicated. When a cell divides, it must first duplicate its genome so that each daughter cell contains a complete set of chromosomes.

One of the most remarkable characteristics of DNA is its ability to replicate; In other words, it has the ability to form copies of itself. Replication takes place in the synthesis (S) phase of the cell cycle. This stage is an obligatory step to carry out cell division. Therefore, it is determined that genetic information is transferred from one cell to another through the process of DNA replication.

The goal of replication is to conserve genetic information. The structural representation of DNA in a double helix allows us to understand how this molecule can give rise to other identical ones, without losing its conformation. In principle, the two strands should be separated and then, by the action of an enzyme, add deoxyribonucleotides and, depending on base complementarity, construct DNA from the two initial template strands.











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