Flagellar tip activation in vis-à-vis pairs of Chlamydomonas eugametos

An alteration of the form and ultrastructure of the tips of the flagella of Chlamydomonas eugametos, occurring during sexual agglutination, is shown to be persistent in the mt- flagella of the resulting vis-a-vis pairs. It is argued that this phenomenon is related to the lack of motility of mt- flagella in vis-a-vis pairs of this species.