An Arginine-Requiring Strain of Neurospora Is Crossed to a Wild-Type

Essay

An arginine-requiring strain of Neurospora is crossed to a wild-type (prototrophic)strain.
a)In the first cross,half of the progeny are arginine-requiring and half are wild type.What does this tell you about the genetic basis of the arginine-requiring mutant?
b)In the second,the progeny are 83 arginine-requiring and 13 wild type.The germination percentage of ascospores is 95/100%.Explain these results simply,and tell briefly how you would confirm your explanation.