Progrès dans la science et la technologie des cultures

Abstrait

Review on Genetics of Mutation

Daniel Nadew

A mutation is a heritable change in a living cell's DNA that isn't created by genetic segregation or recombination. The mutation occurs not just at the DNA level, but also at the chromosomal level. Autosomal dominant, autosomal recessive, X-linked recessive, X-linked dominant and Y-linked (holandric) illnesses are all caused by abnormalities in the DNA sequence of a gene. Evolutionary changes in genes produce genetic variety over time. Mutations are important in the development of genetic differences in organisms. If particular parts of the genome are more prone to mutation than others, it may potentially skew patterns of genetic variation. Chromosomal abnormalities, such as numerical and structural damages, cause chromosomal diseases. Such changes are manifested in a species' natural variety, which can be preserved by man in the form of seed reserves, plant tissue stocks, and gene banks at national and international agricultural institutes. The vast majority of mutations have either detrimental or beneficial impact on the organism in which they arise. The bulk of mutations have extremely minor consequences, according to current research. Nowadays, mutation plays a significant role in the generation of variety among organisms in order to satisfy human needs in advance.