According to the level of changes in the hereditary material, the following types of mutations are distinguished:
1. Genomic mutations – changes in the karyotype, multiple (3p, 4p, 8p …) and non-multiple (2p ± 1; 2p 2 …) to the haploid number of chromosomes. For example, with Down’s disease, three chromosomes of the 21st pair are present in the karyotype.
2. Gene, or point-to-point mutations – changes caused by the replacement, loss or insertion of one or more nucleotides within the same gene. They entail a change in the structure of proteins, which consists in the appearance of a new amino acid sequence in the polypeptide chain.
3. Chromosomal mutations – a change in the structure of chromosomes. These mutations can occur due to the loss of the chromosome of its part or the acquisition of a new, uncharacteristic for it site, which can lead to the death of the body.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.