English
Inheritance of some genetic diseases is linked to a sex chromosome. These disorders are also called sex-linked diseases.
Approximately 800 various genes were identified on the X chromosome. The Y chromosome contains only 45 genes, which are predominantly connected with the determination of male sex and with spermatogenesis. For this reason, sex-linked diseases are primarily determined by the presence of abnormal variations of genes located on the X chromosome. Tt has become customary to refer to sex-linked diseases as X-linked diseases.
