Write Factors of Modern Synthetic Theory of Evolution.

Question: 

Write Factors of Modern Synthetic Theory of Evolution.

Answer:

There are some factors describing the modern theory of synthetic evolution which are as explained below-

In addition to these reactions, the other factors affecting the working of the process are the migration of the individuals from one form of the population to other, hybridization between the races of species increases the genetic variability of the popu­lation.

Recombination or Variation

Recombination of the new genotypes from the existing genes. The gene combinations having same indi­viduals with two kinds of alleles, mixing of the chromosomes during sexual reproduc­tion of two parents produce new individuals, an exchange of the chromosomal pairs of alleles during the meiosis which is called crossing overproduce the new form of gene combinations. Chromosomal mutations like deletion, inversion, duplication, translocation, polyploidy result in the recombination.

Mutation

The changes that occur in the gene due to phenotypic effect differential as the mutation. This produces a variety of changes that may be harmful. Many of the mutant forms of genes are recessive to the normal genes in a homozygous condition. These mutations cause variations in off springs.

Heredity

The transmission occurring in the variations from the parents to their off springs is a primary mechanism in the evolution. The organisms which possess hereditary properties are favored in the struggle for the existence. By this, the off springs benefit from the characteristics of parents.

Natural selection

Natural selection produces a change in the frequency of the genes from one generation to the other favouring the differential form of the reproduction. The natural selection process creates an adaptive relation between the environment and the population through various combinations of genes.

Isolation

It is one of the significant factors responsible for the synthetic theory of evolution. The isolation helps in preventing the interbreeding of related organisms which is a reproductive form of isolation.