If the blastopore dorsal lip is grafted from one salamander embryo onto a second embryo,the second dorsal lip will
A) change the polarity of the adjacent segments.
B) block gastrulation.
C) change the developmental fate of the surrounding cells.
D) change the prospective potency of the surrounding cells.
E) cause rapid cell division.

Question

Quizplus · Accepted Answer

The dorsal lip of the blastopore is responsible for organizing the development of the embryo. When it is grafted onto a second embryo, it will change the developmental fate of the surrounding cells by inducing them to differentiate into dorsal structures. This is known as induction and has been extensively studied in amphibian development. The polarity of adjacent segments, the blocking of gastrulation, and the rapid cell division are unlikely outcomes of this grafting experiment. The prospective potency of the surrounding cells may be influenced by induction, but this is not a definitive outcome.

If the Blastopore Dorsal Lip Is Grafted from One Salamander