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Evolution: hox genes and the cellared wine principle.

¹Department of Genetics, North Carolina State University, Raleigh 27695-7614, USA. ggibson@unity.ncsu.edu

Current Biology : CB

|June 30, 2000

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Hox genes like fushi tarazu and bicoid in fruit flies evolved new segmentation roles from older homeotic genes. This shows how essential developmental genes can change functions across species over time.

Area of Science:

Developmental Biology
Evolutionary Genetics

Background:

Hox genes are crucial for embryonic development and body plan formation.
Segmentation genes establish the body's repeating units.
Functional divergence allows genes to acquire new roles.

Purpose of the Study:

To investigate the evolutionary origins of segmentation roles for two Drosophila Hox genes.
To understand how developmental genes acquire novel functions.

Main Methods:

Comparative analysis of Hox gene functions across species.
Examination of genetic pathways involved in segmentation.

Main Results:

The Drosophila Hox genes fushi tarazu and bicoid show evidence of functional divergence.

Related Experiment Videos

These genes appear to have evolved segmentation functions from ancestral homeotic genes.

This highlights the plasticity of developmental gene function.

Conclusions:

Genes with critical developmental roles can evolve distinct functions in different species.
Functional divergence is a key mechanism in the evolution of gene function.