Expression of the sonic hedgehog gene
- Abigail Tucker
- Digital Images
- Online
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Description
Lateral view of a stage 15 chick embryo showing
the regions where the sonic hedgehog gene is
switched on (purple). The mRNA is being made in
the notochord and floorplate of the brain and
spinal cord, both of which run along the length of the
embryo. It is also produced in the ventral part of
the forebrain.