In the developing chick vertebral limb bud,the zone of polarizing activity (ZPA)organizes a pattern along the anteroposterior axis.Transplantation of the ZPA from a posterior to anterior position:
A)causes no change in development.
B)induces extra digits with reverse polarity.
C)induces extra digits with the same polarity.
D)induces extra limbs.
E)None of the answer options are correct.

Question

Quizplus · Accepted Answer

The zone of polarizing activity (ZPA) is crucial for organizing the anteroposterior axis in the developing limb. When the ZPA is transplanted from a posterior to an anterior position in the limb bud, it induces the formation of extra digits that have reverse polarity, reflecting its role in specifying digit identity and orientation along the anteroposterior axis.

In the Developing Chick Vertebral Limb Bud,the Zone of Polarizing