The conclusion of Spemann's work,in which he tied off a zygote isolating the nucleus on one side and only cytoplasm on the other,helped prove
A) origin of the coelom.
B) nuclear equivalency.
C) cytoplasmic specification.
D) Embryonic induction

Question

Quizplus · Accepted Answer

Spemann's work provided evidence for nuclear equivalency, which is the idea that all cells in the early embryo have the same genetic information and potential to develop into any type of cell. By isolating the nucleus on one side of the zygote, Spemann showed that the cytoplasm alone could not direct development; the nucleus was required for normal development. This supports the idea of nuclear equivalency, as it shows that cells with the same cytoplasmic components can develop differently based on their nuclei.

The Conclusion of Spemann's Work,in Which He Tied Off a Zygote