The figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid. Neurospora has an arginine amino acid synthesis pathway shown below....

The figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid.

Neurospora has an arginine amino acid synthesis pathway shown below. Suppose I have a Neurospora strain that has a mutation such that it will not grow unless I supplement the media (food) with arginine (but not with citrulline or ornithine). What gene is mutated? Explain your reasoning.

Extracted text: ornithine citrulline arginine I I Enzyme A Enzyme B Enzyme C Gene A Gene B Gene C


Extracted text: Adult Germinating conidium Vegetal Spore Gametes 140O Ascospore HAPLOID Meiosis Fertilization DIPLOID Nue (Zygote • 2001 Sinauer Associates, Inc.