Forebrain Defects in Zebrafish yot(gli2) mutants

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Frontal views of 2 day old zebrafish embryos (anterior up) in which retinal ganglion cells
were labeled with the Zn-5 antibody. In wild type embryos (left) retinal axons cross
the midline of the forebrain to form  the optic chiasm.  In yot(gli2) mutants (right), retinal
axons fail to cross the midline and an ectopic midline lens forms in place of the pituitary. 

Click to learn how our lab is investigating Hh/Gli signaling in axon guidance and pituitary development.