Fig. 7.

Relative fraction of the total growth period that neurites of anti-β-galactosidase-injected embryos spent retracting (left), idling (center), or extending (right). The categories of neurites are otherwise the same as in Figure 6. None of the differences between labeled and unlabeled neurons were significant (Student's t test), and the number of neurites in each category is the same as in Table2.