Spradling

Caption

This image shows an example of defects in the development of the embryonic central nervous system in stored eggs that lacked the Fmr1 gene — stored being the key word, since un-stored eggs showed normal development. Analogous to the spinal cord, the ladder-like ventral nerve cords on the right are from stored eggs lacking in Fmr1. The image on the left is a normal ventral nerve cord with functioning Fmr1.
Credit

Courtesy of Ethan Greenblatt and Allan Spradling.

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