Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 12 - Test Your Understanding - Level 3 - Synthesis/Evaluation: 12

Answer

Kinetochore microtubules would probably have minus-end directed motor proteins since these would pull the chromosomes to the pole, to the newly forming nucleus. In contrast, non-kinetochore microtubules would have plus-end directed motor proteins to push the poles further apart.

Work Step by Step

The key here is to see the two activities of the spindle in separating the chromosomes: 1) Pulling the chromosomes apart to the poles and 2) Pushing the two poles further apart.
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