Dominance Alternating

Alternating dominance (DA) is a genetic phenomenon in which, during the development of an organism, first one allele appears, and then, after some time, another allele from heterozygous pairs. This phenomenon is observed in some cases when inheriting traits that depend on gene expression.

In DA, when an organism develops, one allele of a gene first appears, and then after some time another allele appears. This may occur because gene expression is influenced by various factors such as temperature, nutrition, hormones, etc. For example, some genes may only be active under certain conditions, and if these conditions change, allelic switching may occur.

DA can be useful for understanding the mechanisms of development and functioning of the body. For example, it can help determine which genes are associated with certain traits and how they interact with each other. In addition, studying DA may help develop new treatments for diseases associated with genetic disorders.

However, YES can also have negative consequences. For example, if one allele is pathogenic and the other allele is normal, then the organism may exhibit symptoms of both alleles at the same time. This can lead to serious illness and even death.

Overall, DA is an interesting phenomenon that can help us better understand the mechanisms of development and functioning of organisms. However, it is necessary to take into account possible negative consequences and take measures to prevent their occurrence.

Alternate dominance

The principle of alternation In accordance with this principle, phenotypic differences between two forms can appear only at a certain stage of individual development. For example, in a pea plant, the “early flowering” phenotype is formed only after the vernalization phase, since before that another allele, “late flowering,” dominates. In the life cycle of plants or animals, some stage of individual development will be followed by the manifestation of a recessive phenotype due to the change from a dominant allele to a recessive one at a certain stage of metamorphosis. Usually, simple traits appear first due to the fact that there is a sharp transition from stages with more pronounced expression of dominant genes to stages where recessive genes begin to appear