We describe a mutant of Chlamydomonas reinhardtii in which basal body associated striated fibers are absent or incomplete. Basal body spacing, angle, and relative rotational orientation are abnormal and extremely variable. Abnormal partitioning of cellular contents at cytokinesis is also evident. Mating, maintenance of flagellar length equality, and backward swimming response are normal. Genetic analysis indicates mutation of a new Mendelian gene--vfl-3--linked to the centromere of Chromosome VI.

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