If a researcher studying amphibian development blocked the secretion of BMP proteins by mesoderm under the embryo's dorsal surface, the likely result would be that the
A) overlying ectoderm would become epidermis.
B) overlying ectoderm would become dermis.
C) overlying ectoderm would become neural tissue.
D) underlying endoderm would form neural tissue.
E) underlying endoderm would form dermis.

Question

Quizplus · Accepted Answer

BMP proteins are involved in the formation of dermis and epidermis from the overlying ectoderm. Blocking BMP secretion would lead to the overlying ectoderm defaulting to a neural fate, as this is the default fate of the ectoderm in the absence of BMP signaling. The underlying endoderm would not be affected by the lack of BMP signaling in the mesoderm.

If a Researcher Studying Amphibian Development Blocked the Secretion of BMP