In most cases, single-gene mutations happen during replication meiosis transcription translation

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.