After the animals are genetically evaluated and best determined to be fathers of the next generation, we choose the appropriate breeding methods to increase the frequency of genes desired for the species in the clan or herd to be improved. Increasing the frequency of genes to desired traits is the main goal of animal breeders in order to obtain animals with high production and need a minimum of care and be strong body and have good character traits and has the ability to resist many diseases and characterized the length of productive life, Relations between all these qualities. In general, changing the frequency of the gene is chosen by either the mutation or migration and random chance plays a limited role in changing the frequency of the gene.
Election:
May occur naturally by an environmental or hereditary effect and effective selection is the industrial selection by decisions made by the educator on his or her animals. Selection is the effective means of changing the frequency of the gene in a simplified manner, the selection of animals with good qualities means giving them the opportunity to produce offspring and the dissemination of genetic composition by more than other animals in the herd according to the intensity of election and depends on the intensity of the election on the number of herd animals and the number of animals elected and note that the intensity of election in males be Fold what they are in females. The election may be for one or several attributes sequentially or simultaneously.
The boom:
Is a sudden change in genetic makeup. This change either has a new gene or modifies the effect of an already existing gene. Usually the rate of mutation in the animal is very low and lost after several generations and is not a tool through which the change of gene replication is effective and often need new mutations for a very long time to see the results.
Migration:
Is the transmission of animals from one clan to another, adding new blood to it. This is an effective means of changing the frequency of the gene. The change in the frequency of the gene depends on the difference in the frequency of the genes between the two populations and on the proportion of migratory animals.
Election:
May occur naturally by an environmental or hereditary effect and effective selection is the industrial selection by decisions made by the educator on his or her animals. Selection is the effective means of changing the frequency of the gene in a simplified manner, the selection of animals with good qualities means giving them the opportunity to produce offspring and the dissemination of genetic composition by more than other animals in the herd according to the intensity of election and depends on the intensity of the election on the number of herd animals and the number of animals elected and note that the intensity of election in males be Fold what they are in females. The election may be for one or several attributes sequentially or simultaneously.
The boom:
Is a sudden change in genetic makeup. This change either has a new gene or modifies the effect of an already existing gene. Usually the rate of mutation in the animal is very low and lost after several generations and is not a tool through which the change of gene replication is effective and often need new mutations for a very long time to see the results.
Migration:
Is the transmission of animals from one clan to another, adding new blood to it. This is an effective means of changing the frequency of the gene. The change in the frequency of the gene depends on the difference in the frequency of the genes between the two populations and on the proportion of migratory animals.
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Genetic Engineering