Abdominal-B (Abd-B) mutants of the bithorax-complex (BX-C) were studied in trans with tuh-3 to evaluate their interactions with this homeotic mutant and the maternal effect locus (tuh-I) controlling tuh-3 expression. Head defects occur in tuh-3 offspring from tuh-lh homozygous mothers, while genital defects occur in homozygous tuh-3 offspring from mothers carrying the tuh-Ig allele. The influen...

ion also makes use of a model of the world and can be viewed as a deliberative approach to solve reasoning tasks. As an antithesis to this classical AI paradigm (and in particular to the planning paradigm) an approach has been developed that explicitly does not make use of knowledge representation and complicated deliberations (such as planning the best next step in the proof search). Brooks ph...