Also found in: Thesaurus, Medical, Encyclopedia.
Related to isogamous: anisogamous


Reproduction by the fusion or conjugation of isogametes, as in certain algae and fungi.

i·sog′a·mous adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(aɪˈsɒg ə məs)

having or reproducing by two morphologically indistinguishable gametes (opposed to heterogamous).
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
However, if this idea is correct, maternal transmission of organelle DNA should not occur in isogamous organisms where there are no size differences between male and female gametes.
However, in Ulvophyceae the furrowing type of somatic cytokinesis, the cruciate, flagellar roots of the motile cell, and the fact that not only male but also female gametes of Ulva are motile (the gametes being isogamous or anisogamous) would all but preclude the direct involvement of ulvophytes in land-plant origins (cf.
For the inbreeding effective size, however, they considered six specific cases: case 1: isogamous monoecious diploids with selfing permitted, or case 2: excluded; case 3: male and female gametes distinguished with selfing permitted, or case 4: excluded; and case 5: separate sexes with progeny identified as to sex, or case 6: not identified.