Definition

Noun: 1. Similarity in structure due to common ancestry: In biology, homogeny refers to the structural similarity between different organisms or parts of organisms that results from their descent from a common ancestor. It is a concept related to homology.

Usage Examples

• The homogeny in the bone structure of a human arm, a whale's flipper, and a bat's wing is evidence of their shared evolutionary history.
• Comparative anatomy studies the homogeny of organs across species to trace their phylogenetic relationships.
• The scientist's research focused on the genetic homogeny underlying the similar developmental pathways in vertebrates.

Advanced Usage

• Technical Context: The term is used primarily in technical biological and evolutionary discourse to describe deep structural correspondences, as opposed to superficial similarities (analogy).
  • The observed homogeny in these protein sequences strongly supports the theory of a single ancestral gene.

Variants and Related Words

• Homologous (adj): Having the same relation, relative position, or structure, typically as a result of common ancestry.
  • The forelimbs of mammals are homologous structures.
• Homology (n): The state of being homologous; the study of homologous structures. (Note: "Homology" is a more commonly used term than "homogeny" for this concept).
  • Molecular homology can be detected by comparing DNA sequences.

Synonyms

• Homology: The corresponding relationship or similarity due to common descent.
• Structural correspondence: A more general phrase indicating similarity in form or arrangement.

Antonyms

• Heterogeny: (Biology) Dissimilarity in structure or origin.
• Analogy: A similarity in function or appearance between structures that does not result from common ancestry but from convergent evolution.

Noun

1. (biology) similarity because of common evolution