In Neurospora, the mutations arg, thi, and leu block the synthesis of arginine, thiamine, and leucine, respectively. The following ordered tetrad data come from two crosses with these mutations:

Using these data, construct the linkage map(s) for these genes. Show the position of the centromere(s).

Transcribed Image Text:

Number of Spore Pairs Cross Tetrads (1,2) (3,4) (5,6) (7,8) arg x thi arg + arg + + thi + thi 46 arg thi arg thi ++ 56 ++ Total = 100 arg+ arg ++ leu + leu 155 arg x leu + leu 44 arg+ arg leu + + arg+ + leu arg+ + leu Total = 200