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Related Experiment Video

Updated: Nov 5, 2025

Quantitative Comparison of cis-Regulatory Element CRE Activities in Transgenic Drosophila melanogaster

Quantitative Comparison of cis-Regulatory Element CRE Activities in Transgenic Drosophila melanogaster

Published on: December 19, 2011

Evolution of default genetic control mechanisms.

William Bains^1,2, Enrico Borriello³, Dirk Schulze-Makuch^4,5,6

¹Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States of America.

|May 13, 2021

Summary

This summary is machine-generated.

This study models genome control system evolution. Complex genomes favor

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Area of Science:

Evolutionary biology
Systems biology
Genomics

Background:

The Jacob and Monod model describes gene control.
Genes have control elements responding to internal and environmental cues.

Purpose of the Study:

To model the evolution of genome control systems under environmental constraints.
To investigate conditions favoring specific genetic control logic.

Main Methods:

A computational model simulating gene control evolution.
118 simulation runs with varying parameters and an average of 1.4 million generations per run.

Main Results:

Evolved control logic showed no significant correlation with environmental complexity.
Genetic logic strongly correlated with genome complexity and gene expression fraction.
Complex genomes evolved 'default on' controls; low expression favored 'default off' logic.

Conclusions:

Genome complexity and expression levels, not environmental complexity, shape genetic control logic.
Findings may explain the 'default off' mode of complex eukaryotic genomes.