Question

Beadle started his career working on Drosophila, but changed his study system to bread mould (Neurospora crassa) for his studies in biosynthetic pathways. Why might it be easier and less time-consuming to use bread mould (a haploid organism) to study the effects of induced mutation on enzyme function?

and
Describe the minimal suite of genes that must be encoded by a non-enveloped virus with an RNA genome. Explain why these need to be encoded and others do not.