How were mutants used to order the sevenless-Ras pathway?
A)Cells that expressed a constitutively active Ras mutant protein did not require Sevenless activation to become R7.
B)Cells that expressed a constitutively active Sevenless mutant protein did not require Ras activation to become R7.
C)Cells that expressed an inactive Ras mutant protein did not require Sevenless activation to become R7.
D)Cells that expressed a constitutively-inactive Sevenless mutant protein did not require Ras activation to become R7.

Question

Quizplus · Accepted Answer

Cells expressing a constitutively active Ras mutant protein bypass the need for Sevenless activation, indicating Ras acts downstream of Sevenless in the pathway leading to R7 cell development.

How Were Mutants Used to Order the Sevenless-Ras Pathway