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

question 23

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.

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Definitions:

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A major Islamic medieval dynasty originating from Central Asia, which played an important role in the history of the Middle East during the 11th and 12th centuries.

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A specific depiction of Christ in Christian iconography, representing him as the all-powerful ruler of the universe, often seen in Byzantine art.