FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
Homozygotes have normal activity rhythm periods.
The period of dyunspecified/CkIIβAnd flies is indistinguishable from that of CkIIβAnd/+ flies and is significantly shorter than that of CkIIβAnd homozygotes.