Question #3 when yeast cells are starved, they change their shape from roughly spherical cells to elongated tube-shaped cells. this response to starvation is known as filamentous growth. filamentous growth provides a mechanism for the yeast cells to forage for nutrients. you are studying the signal transduction pathway that causes filamentous growth in yeast in response to starvation. you identify three genes that are required for this pathway, cdc42, kss1 and tec1. cells that are missing any of these three proteins are not able to undergo filamentous growth. gain following questions (a-c) based on this information. f function alleles of each of these genes cause filamentous growth even in the absence starvation conditions. answer the a. you create a yeast strain that lacks cdc42 and has a constitutively active allele of kss1 and find that this strain undergoes filamentous growth starvation conditions. you next create a second strain. the second strain contains a constitutively active allele of cdc42 and lacks kss1 function. you find that this second strain does not undergo filamentous growth even in the presence of starvation conditions. based on these observations can you tell the order of action of cdc42 and kss1? if so, what is the order? the absence of b. you create a third yeast strain that lacks kss1 function and has a constitutively active allele of tec1. this strain undergoes filamentous growth even in the absence of f kss1 and find that this strain cannot undergo filamentous growth starvation conditions. you create a fourth strain that lacks tec1 and has a constitutively active allele even under starvation conditions. based on the data from your four strains, draw a regulatory diagram that accurately describes the filamentous growth pathway. c. your three genes encode a ras family member, a ser/thr kinase, and a transcription factor. which gene most likely codes for which protein?