A Neurospora cross was made between a strain that carried the mating-type allele
ID: 32356 • Letter: A
Question
A Neurospora cross was made between a strain that carried the mating-type allele A and the mutant allele arg-1 and another strain that carried the mating-type allele a and the wild-type allele for arg-1 (+). Four hundred linear octads were isolated, and they fell into the seven classes given in the table below. (For simplicity, they are shown as tetrads.) Determine if the loci are linked and why.
Question 20 options:
They are not linked because PD > TT
They are linked because TT > 0
They are not linked because PD = NPD
They are linked because (PD + NPD) > TT
They are not linked because PD > (0.5)(NPD)
They are linked because PD > NPD
They are not linked because PD > TT
They are linked because TT > 0
They are not linked because PD = NPD
They are linked because (PD + NPD) > TT
They are not linked because PD > (0.5)(NPD)
They are linked because PD > NPD
Explanation / Answer
They are not linked because PD > (0.5)(NPD)
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