Two crosses were made in Neurospora involving the mating type locus and either t
ID: 54497 • Letter: T
Question
Two crosses were made in Neurospora involving the mating type locus and either the ad or p genes. In both cases, the mating type locus (A or a) was one of the loci whose segregation was scored. One cross was ad A × ad a (cross a), and the other was p A × p a (cross b). From cross a, 10 parental ditype, 9 nonparental ditype, and 1 tetratype asci were seen. From cross b, the results were 24 parental ditype, 3 nonparental ditype, and 27 tetratype asci.
What are the linkage relationships between the mating type locus and the other two loci?
Explanation / Answer
a. The two loci are linked.
b. The two loci are on different chromosomes.
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