What is the name of the body’s ability to acquire new signs and properties?

Variability is a skill of the organism, in which new properties and signs appear under the influence of certain factors. Currently, there are two varieties of it, this is phenotypic and hereditary. The first appears due to the influence of various environmental factors and is not transmitted to its offspring from the parent. Another form is hereditary. It appears by changing the genotype of the creature. A mutational process (a sudden change in a gene or chromosome) or combinative (this occurs due to the fusion of germ cells).