Describe the main selection methods

The main methods of selection are artificial selection, hybridization, mutagenesis and polyploidy.
Artificial selection is a person’s choice of the most valuable animals and plants of a given species, breed or variety to obtain offspring with desirable properties from them.
Hybridization is the process of creating hybrids from two parental organisms that differ in genotype and reproduce sexually. A striking example of heterosis is a mule – an interspecific hybrid obtained by crossing a horse with a donkey. Mutagenesis is the process of the occurrence of hereditary changes (mutations) under the influence of various physical and chemical factors (mutagens).
Polyploidy is a hereditary change characterized by a multiple increase in the haploid set of chromosomes in the cells of the body.

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