behavior/neurological
• under both constant darkness (DD) and constant light (LL) conditions, the average period length is significantly shorter in mutants
• the distribution of period lengths is more scattered in mutants than wild-type
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• light pulses delivered at CT 22 provoke dramatic phase advances in mutants compared to wild-type
• large phase advances are seen only in mutants kept in DD for longer than seven days
• the difference in phase-shifting is limited to the second half of the night
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reproductive system
• litter size of homozygous females is only about half that seen in wild-type females
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