Chapter 20 - Processes of Evolution - 20.3 - Evolution Can Be Measured by Changes in Allele Frequencies - 20.3 Recap - Learning Outcomes - Page 436: 2

In arthropods, a Ubx gene alteration resulted in a protein that blocked the Dll gene, which is required to develop legs. Since insects express this modified gene in their abdominal segments, no legs are found on these segments. Other arthropods like centipedes produce an intact Ubx protein and do have legs attached to their abdominal segments.

In arthropods, a Ubx gene alteration resulted in a protein that blocked the Dll gene, which is required to develop legs. Since insects express this modified gene in their abdominal segments, no legs are found on these segments. Other arthropods like centipedes produce an intact Ubx protein and do have legs attached to their abdominal segments.