[The neuronal zootype]

Area of Science:

• Developmental Biology
• Evolutionary Genetics
• Neuroscience

Context:

• The zootype concept provides a framework for understanding conserved developmental genes.
• Hox genes play a crucial role in animal body plan development and evolution.

Purpose:

• To propose a novel hypothesis on the primordial function of zootype genes.
• To investigate the role of zootype genes in neuronal network formation and axon pathway specificity in bilaterians.

Summary:

• This hypothesis posits that zootype genes primarily function to establish neuronal networks by regulating axon pathway specificity in bilaterian animals.
• This proposed function is considered both the primary role in development and the primitive function in evolution.
• The hypothesis is examined in light of current knowledge regarding Hox genes, including their evolution, genomic organization, expression, and targets.

Impact:

• This research could redefine our understanding of early gene functions in animal evolution.
• It offers a new perspective on the developmental roles of zootype and Hox genes in establishing neural architecture.