When homozygous in females, their receptivity to male courtship and mating attempts is essentially the same as for wild-type females.
Jumping ability very poor. In open field chamber tests, speed of locomotion (number of squares entered/unit time) reduced but not the amount (proportion of time spend moving); amount of speed changes in wild-type-like manner with advancing adult age (cf. hypoC1).
Requires extensive agitation to induce movements and becomes inactive more quickly than normal when agitation ceases; males inactive in courtship.