·     A strain of yeast requiring both tyrosine (tyr-) and arginine (arg-) is crossed to the...

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Biology

·     A strain of yeast requiring bothtyrosine (tyr-) and arginine (arg-) is crossed to the wild type.After meiosis, the following 10 asci are dissected. Classify eachascus as to the segregational type (PD, NPD, TT). What is thelinkage relationship between these two loci?

1            arg-tyr-               arg+tyr+              arg+tyr+              arg-tyr-

2            arg+tyr+              arg+try+              arg-tyr-               arg-tyr-

3            arg-tyr+              arg-tyr+              arg+tyr-              arg+tyr-

4            arg-tyr-               arg-tyr-               arg+tyr+              arg+tyr+

5            arg-tyr-               arg-tyr+              arg+tyr-              arg+tyr+

6            arg+tyr+              arg+tyr+              arg-tyr-               arg-tyr-

7            arg-tyr-               arg+tyr+              arg-tyr+              arg+tyr-

8            arg+tyr+              arg+tyr+              arg-tyr-               arg-tyr-

9            arg+tyr+              arg-tyr-               arg-tyr-               arg+tyr+

10          arg-tyr-               arg+tyr+              arg+tyr+              arg-tyr-

Answer & Explanation Solved by verified expert
3.7 Ratings (576 Votes)
Given that two yeast strains are crossed We can show the crossasargtyr argtyrAlso given that 10 asci are obtained We will now classify eachtetrad as1 Parental ditype PD This is because allthe four products resemble parental combinatons argtyr andargtyr2 Parental ditype PD This is because allthe four    See Answer
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