Genetic disorder and Lactase deficiency

Genetic disorder noun - A disease or disorder that is inherited genetically.

Lactase deficiency and genetic disorder are semantically related. In some cases you can replace phrase "Lactase deficiency" with "Genetic disorder", this phrases are similar.

Lactase deficiency noun - Congenital disorder consisting of an inability to digest milk and milk products; absence or deficiency of lactase results in an inability to hydrolyze lactose.

Genetic disorder and lactase deficiency are semantically related. You can use "Genetic disorder" instead a noun phrase "Lactase deficiency".