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ppt slides - MCD Biology

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Experiments that led to the hunt for guidance cues<br />

• Shine a light on retina, record electrical activity from tectum<br />

• a cell in one part of the retina always produced activity in a<br />

particular part of the tectum<br />

• Inject a visible label into neurons<br />

• an injected cell from the retina always projected to a<br />

particular place in the tectum<br />

Conclusion: Cells<br />

in retina have<br />

specific targets<br />

in the tectum

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