Homology (biology) - Wikipedia
In biology, homology is similarity in anatomical structures or genes between organisms of different taxa due to shared ancestry, regardless of current functional differences.

Homologies - Understanding Evolution
Homologies can be identified by comparing the anatomies of different living things, looking at cellular similarities, studying embryological development, and studying vestigial structures within individual organisms.

Homology | Morphology, Comparative Anatomy & Genetics | Britannica
homology, in biology, similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor. Homology is contrasted with analogy, which is a functional similarity of structure based not upon common evolutionary origins but upon mere similarity of use.

HOMOLOGY Definition & Meaning - Merriam-Webster
The similarity of a structure or function of parts of different origins based on their descent from a common evolutionary ancestor is homology. Analogy, by contrast, is a functional similarity of structure that is based on mere similarity of use.

What Is a Homology in Biology? Definition & Examples
Two genes are homologous when they descend from a single ancestral gene. Scientists identify genetic homology by comparing DNA or protein sequences and finding stretches that match far more closely than chance would predict. Homologous genes come in several varieties, depending on how they diverged:

What Is a Homologue in Biology and Genetics?
Homology in biology describes characteristics that are similar between different species because they were inherited from a common ancestor. These shared features can manifest as anatomical structures, genes, or proteins.

3.23: Homologies provide evidence for a common ancestor
Detailed analyses of many different types of organisms reveals the presence of a common molecular signature that strongly suggests that all living organisms share large numbers of homologies, which implies that they are closely related - they share a common ancestor.

Homology - Definition and Examples - Biology Online Dictionary
In biology, homology refers to the similarity of the structure, physiology, or development of various species of other organisms as a result of their shared evolutionary parent. It plays a huge part in evolutionary biology.

Homologies and analogies - Understanding Evolution
Teach your students about homologies and analogies: Similarities and differences, a web activity for grades 6-8. Similarities and differences, a web activity for grades 9-12. Find additional lessons, activities, videos, and articles that focus on homologies.

What Is Homology in Biology and Why Does It Matter?
Homology is the term biologists use when two structures, genes, or traits in different species exist because they were inherited from the same common ancestor.