Question

The dorsal lip of the blastopore in amphibian embryos has been found to be an essential organizing region for the development of the neural tube. Spemann and Mangold transplanted the dorsal lip from one embryo onto the belly side of another embryo.
Based on this information, what was the most likely result of this experiment?

• A. Both embryos developed normally.
• B. The donor embryo developed two neural tubes and the recipient embryo failed to develop a neural tube.
• C. The recipient embryo developed two neural tubes and the donor embryo failed to develop a neural tube.
• D. Neither embryo developed a neural tube.

Answer 1

Answer: (C)

The recipient embryo developed two neural tubes and the donor embryo failed to develop a neural tube.

The experiments performed by Spemann on newt embryo, where he transferred the neural plate cells from one gastrula to the other, the recipient gastrula developed two notocords while the donor did not develop any notocord.

So, the correct answer is ' The recipient embryo developed two neural tubes and the donor embryo failed to develop a neural tube'