In a haploid fungus similar to Neurospora,a red-colored mutant is crossed to an alanine-requiring mutant.Assuming independent assortment,what proportion of the spores produced will be alanine-requiring?

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In a haploid organism, each gene is present in a single copy. Therefore, if a mutant requiring alanine is crossed with another mutant (red-colored in this case), all offspring will inherit one copy of each parent's genome. Since the requirement for alanine is a result of a mutation in one of the parents, all spores produced will inherit this requirement, making the proportion of alanine-requiring spores 1/2. This assumes that the mutations are on different genes and assort independently.

In a Haploid Fungus Similar to Neurospora,a Red-Colored Mutant Is