If Gremlin expression were reduced in the cells that give rise to feet in ducks,
A) the feet would be much smaller due to a heterochronic shift.
B) the feet would be much larger due to a heterochronic shift.
C) the feet would be more webbed than normal.
D) the feet would be less webbed than normal.
E) winglike structures would appear where the feet ordinarily would be.

Question

Quizplus · Accepted Answer

Gremlin inhibits BMP signaling, which is responsible for apoptosis in the interdigital tissue. Reduced Gremlin expression would lead to increased BMP activity, resulting in more cell death and less webbing in the feet.

If Gremlin Expression Were Reduced in the Cells That Give