What does isogamete mean?
An isogamete is a reproductive cell that looks essentially the same in size and shape as the other cell with which it will unite. Such gametes occur in some algae, fungi, and other organisms, including certain species whose mating types cannot readily be distinguished by appearance alone. The term is mainly technical and focuses on morphology: it does not necessarily imply that the cells are genetically identical or that the organism has no sexes. In the related condition called isogamy, two similar gametes fuse to produce a zygote. By contrast, anisogamy involves gametes that differ conspicuously in size, structure, or specialization, as is commonly seen in animals, where sperm and eggs play distinctly different roles. Isogametes are therefore of particular interest to biologists studying the evolution of sexual reproduction and the origins of specialized reproductive cells.
nounA reproductive cell whose size and form are essentially the same as those of the other gamete with which it fuses. Isogametes occur in certain algae, fungi, and other organisms and are distinguished from gametes that differ noticeably in size or structure.
- A gamete whose size and external form are essentially the same as those of the gamete with which it fuses.
"The organism reproduces by fusing isogametes that are morphologically indistinguishable."
"Motile isogametes fuse to form a zygote in this species of alga."
"Because the two isogametes look alike, differences between the mating types are not readily apparent from their morphology."
The regular plural is used when referring to reproductive cells collectively.
"The two isogametes fuse to form a new individual."
In isogamy, nature's two reproductive cells meet as biological equals: neither is visibly larger or more specialized.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does isogamete come from?
The word combines the Greek-derived prefix iso-, meaning “equal,” with gamete, a term derived through Latin from Greek gamētēs, “husband,” ultimately associated with gamos, “marriage.” The prefix emphasizes that the two reproductive cells are equal in appearance and size. The related term isogamy names the reproductive process in which similar gametes fuse, while anisogamy refers to the union of gametes that differ in size or form.
Related word forms
How isogamete is actually used
This is a technical biological term, used especially in descriptions of reproduction in algae, fungi, and protozoans. It describes form rather than genetic sex or mating type.
Easily confused with isogamete
An isogamete resembles the other reproductive cell in size and form, whereas an anisogamete differs noticeably from its counterpart.