By transferring neural crest cells from a duck to a quail and vice versa,Schneider and Helms demonstrated that
A)neural crest cells influence the development of beaks.
B)beaks influence fitness traits.
C)homeobox genes are conserved across species.
D)gene duplication causes a difference in beak shape.

Question

Quizplus · Accepted Answer

Schneider and Helms demonstrated that neural crest cells influence the development of beaks by transferring these cells between duck and quail embryos. This experiment showed that the beak shape of the embryonic bird could be altered by the presence of neural crest cells from the other species. Therefore, A is the correct answer. B, C, and D are not supported by this experiment.

By Transferring Neural Crest Cells from a Duck to a Quail