With regard to the establishment of an anterior-posterior axis, which of the following pairs is incorrect?
A)C. elegans - convergent elongation of P granules
B)mammal - orientation of egg and sperm nuclei before fusion
C)insects - morphogen gradients
D)frog - asymmetry in the animal vegetal hemispheres
E)chick - gravity as the egg travels down the oviduct

Question

Quizplus · Accepted Answer

In C. elegans, the anterior-posterior axis is established by the asymmetric distribution of P granules, not by convergent elongation.

With Regard to the Establishment of an Anterior-Posterior Axis, Which