phenotype affects entity abnormal gravitaxis gravitaxis behavior defective geotaxis behaviour defective gravitaxis defective phenotypic_class Phenotype that is a change in the strong tendency, seen in wild-type Drosophila melanogaster, to climb - a behavior otherwise known as negative gravitaxis (GO:0048060 ; movement away from the source of gravity). Note, this term should not be used when flies have climbing defects purely as a consequence of locomotion defects, use 'locomotor behavior defective' instead. FBcv:0000388 phenotype negative gravitaxis negative gravitaxis phenotype