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Leave Me Breathless

More insight into the genetic control of embryonic cell development

08 December 2019

Leave Me Breathless

A cell in a developing embryo has two important choices: where to go and what to do. Getting either of these decisions wrong can have catastrophic effects, altering normal organ growth or even causing a complete failure of development. The pink structures in this image of a developing fruit fly embryo are the cells that will eventually form the animal’s tracheae – the tubes through which it breathes. These structures start from thickened patches of cells which buckle inwards to form pockets that lengthen out into tubes. Researchers have discovered that a gene called ‘trachealess’ helps to direct this process, turning other genes on and off in the cells that build the tracheae. If any of these cells accidentally go astray, they switch their trachealess gene off to avoid making tubes in the wrong place, helping to explain how embryonic cells make the right decisions in the earliest stages of development.

Written by Kat Arney

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BPoD stands for Biomedical Picture of the Day. Managed by the MRC Laboratory of Medical Sciences until Jul 2023, it is now run independently by a dedicated team of scientists and writers. The website aims to engage everyone, young and old, in the wonders of biology, and its influence on medicine. The ever-growing archive of more than 4000 research images documents over a decade of progress. Explore the collection and see what you discover. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.

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