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Gene duplication (or chromosomal duplication or gene amplification) is a major mechanism through which new genetic material is generated during molecular evolution. It can be defined as any duplication of a region of DNA that contains a gene.
31 Οκτ 2023 · Gene Duplication. Gene duplication is the process by which a region of DNA coding for a gene is copied. Gene duplication can occur as the result of an error in recombination or through a retrotransposition event. Duplicate genes are often immune to the selective pressure under which genes normally exist.
Definition. The term gene duplication describes a situation where a single ancestral gene has been copied such that two (or more) copies of that gene now exist in a single genome.
DUPLICATION AND AMPLIFICATION BY MULTISTEP PROCESSES DURING GROWTH UNDER SELECTION. Most models for duplication formation, like those for point mutations, propose a single discontinuous event or a cascade of immediately sequential events with intermediate structures that cannot be inherited.
Learn how deletions and duplications of DNA sequences can affect gene dosage and cause diseases. Explore the mechanisms, examples, and evolutionary implications of these chromosomal rearrangements.
20 Δεκ 2023 · Duplicate genes are genes that have identical or nearly identical DNA sequences and are found in the same or different regions of a chromosome or in different chromosomes within a genome. These genes are formed as a result of DNA replication or mutation events that create new copies of a gene.
