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Question: four haploid fungal mutants that require compound w for growth...

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2. Four haploid fungal mutants that require compound W for growth were isolated. Each mutant contains a recessive allele in a single gene. Three compounds (A, B and C) in the biosynthetic pathway to W are known, but their order in the pathway is unknown. Each compound is tested for its ability to support the growth of each of the four mutants (1 through 4). Phenotypes of all of the four mutants are shown in the following table indicates growth, indicates no growth). AA B C W Mutant 1 Mutant 2 Mutant 3 I- Mutant 4 a) Draw the order of compounds A, B, C in the pathway of the synthesis of compound W, label at which point in the pathway is each mutant blocked? (2 pts) b) What would be the phenotype of the diploid formed by crossing mutant 3 and 4? (1pt) c) What would be the phenotype of the diploid formed by crossing mutant 1 and 2? (1pt) d) The diploid formed by crossing mutant 1 and 2 undergoes meiosis. What are the progenys phenotype (assume independent assortment of mutant 1 and mutant 2)? (1pt)

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