Which of the following processes occurs when a salamander regenerates a lost limb?
A)The homeotic genes of the regenerating limb are expressed.
B)Certain cells in the limb dedifferentiate, divide, and then redifferentiate to form a new limb.
C)A new salamander develops from the lost limb.
D)The homeotic genes of the regenerating cells turn off.

Question

Quizplus · Accepted Answer

When a salamander regenerates a lost limb, certain cells in the limb undergo dedifferentiation, which means they lose their specialized characteristics and become unspecialized cells that can divide. These cells then go through the process of cell division and differentiation to form a new limb. The process of gene expression and regulation occurs during this process, but the homeotic genes do not turn off, as they are needed for proper limb formation. Option A is only partially correct, as homeotic genes are expressed, but they do not turn off. Option C is incorrect, as a new organism does not develop from a lost limb. Option D is also incorrect, as the homeotic genes do not turn off during limb regeneration.

Which of the Following Processes Occurs When a Salamander Regenerates