Definition

1. Verb:
   • To make homologous: To cause or establish a correspondence in relative position, structure, or evolutionary origin between different things. In biology, this often means to identify or treat structures as having a common evolutionary ancestry, despite differences in form or function.
   • To become or be homologous: To correspond in such a way, often used in a passive or intransitive sense.

Usage

• As a transitive verb (to make something homologous): Scientists homologise anatomical features to trace evolutionary lineages.
• As an intransitive verb (to correspond as homologues): These two bone structures homologise across different species.

Examples

• Transitive use:
  • The researcher sought to homologise the wing of a bat with the arm of a human.
  • To understand deep relationships, taxonomists must homologise traits from diverse organisms.
• Intransitive use:
  • The genetic sequences from the two species homologise perfectly, indicating a common ancestor.
  • These developmental pathways homologise despite the organisms' different adult forms.

Advanced Usage

• In evolutionary biology: The primary context is comparative anatomy and genetics, where establishing homology is fundamental to building phylogenetic trees.
  • The challenge is to homologise behavioral patterns, not just physical structures.
• In chemistry (less common): Refers to making compounds part of a homologous series (compounds with the same functional group differing by a unit).
  • The reaction homologises the carbon chain, adding one methylene group.

Variants and Related Words

• Homologize: The preferred spelling in American English. It has identical meanings and usage patterns to 'homologise'.
• Homologue/Homolog (noun): A thing that is homologous to another.
• Homologous (adjective): Having the same relation, relative position, or structure.
• Homology (noun): The state of being homologous; the correspondence itself.

Synonyms

• Correspond: To have a close similarity, match, or equivalence.
• Equate: To regard or treat as the same or equivalent.
• Analogize: To make an analogy between two things. (Note: This differs as analogy implies similar function but not necessarily common evolutionary origin, unlike homology.)

Antonyms

• Differentiate: To recognize or identify as different; to distinguish.
• Heterologise (rare): To make or become heterologous (of different origin).

Related Phrases/Concepts

• Establish homology: A common phrase meaning the same as 'to homologise'.
  • The study aimed to establish homology between the insect and vertebrate eyes.
• Homologise to/with: The typical prepositions used.
  • One must carefully homologise the feature to its counterpart in the ancestral species.
  • This gene homologises with a gene known to regulate growth in mammals.

Verb

1. make homologous