What features of a person as an object of genetics complicate the study of his heredity and variability?

For humans, it is impossible to experimentally obtain mutations; the hybridological method is not applicable. In addition, the genetic analysis is complicated by a number of factors: a large number of chromosomes (2n = 46), a small number of offspring in the family, a slow generation change (one generation is an average of 30 years), wide genotypic and phenotypic polymorphism (diversity), etc.

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.