What is the result of chromosomal duplication?
The duplication occurs when part of chromosome 1 is copied (duplicated) abnormally, resulting in the extra genetic material from the duplicated segment. If the condition is inherited from a parent, it means that one of the parents also has the extra piece of genetic material.
What is a duplication and what evolutionary significance might it have?
A duplication occurs when a gene or group of genes is copied to multiple regions of chromosomes. This has evolutionary significance because a gene can be retained in the original site and duplicate sites can undergo mutations that may be selected for by nature.
What is the importance of such duplication?
Gene duplication is an important mechanism for acquiring new genes and creating genetic novelty in organisms. Many new gene functions have evolved through gene duplication and it has contributed tremendously to the evolution of developmental programmes in various organisms.
How does chromosomal duplication play important role in evolution?
Gene and genome duplications provide a source of genetic material for mutation, drift, and selection to act upon, making new evolutionary opportunities possible. As a result, many have argued that genome duplication is a dominant factor in the evolution of complexity and diversity.
What is the significance of polyploidy and gene duplication in general to evolution?
Of the many processes that generate gene duplications, polyploidy is unique in that entire genomes are duplicated. This process has been important in the evolution of many eukaryotic groups, and it occurs with high frequency in plants.
Why are duplication mutations important in evolution?
Gene duplication is very important for the evolution of species because it can facilitate the creation of new genes. Normally, changes to genes result in loss of function and so are weeded out by natural selection.
What are 3 possible fates of a duplicated gene?
Figure 2.4. Three possible fates of duplicated genes: pseudogenization (nonfunctionalization), neofunctionalization, and subfunctionalization using cis-regulatory modules as targets of divergence.