After irradiating wild-type cells of Neurospora (a haploid fungus), a geneticist finds two leucine-requiringauxotrophic mutants. He combines the two mutants ina heterokaryon and discovers that the heterokaryon isprototrophic.a. Were the mutations in the two auxotrophs in the samegene in the pathway for synthesizing leucine or in twodifferent genes in that pathway? Explain.b. Write the genotype of the two strains according toyour model.c. What progeny and in what proportions would youpredict from crossing the two auxotrophic mutants?(Assume independent assortment.)

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.