Homologous
(adjective)
Similar in structure and evolutionary origin; having a common origin or structure but with different functions.
Origin:
Derived from the greek word "homologos" meaning having the same origin or source, similar in structure and evolutionary origin.
Examples:
- The human arm and the bat wing are homologous structures.
- The fish fin and the mammal limb are homologous structures.
- The homologous chromosomes are identical in size, shape and genetic content.
- The homologous proteins perform different functions in different organisms.
- The homologous genes have the same sequence but different functions.