A gene related to a similar gene by duplication within a genome. Paralogs tend to evolve new, related functions.

Paralogs are genes related by duplication within a genome. Orthologs retain the same function in the course of evolution, whereas paralogs evolve new functions, even if these are related to the original one.

a homolog that has a function different from the sequence it is compared to. See also homolog and ortholog

paralogous