Thursday 12 October 2017

More practice!

Another example - Can you spot what's tricky about these data?

You cross a triple-mutant female fly from its stock vial with a wild-type stock male.  The F1 females are testcross and the following data are obtained:

reduced bristle, black body
1132
reduced bristle, thread arista
27
black body, thread arista
31
reduced bristle 
30
thread arista
1087
reduced bristle, black body, thread arista
1295
wild type
1201
black body
31
a)    Provide gene symbols using the three-letter system you read about in the Advanced 
      Nomenclature worksheet.
b)    Draw the genetic arrangement of the F1 fly, the tester, and the P generation.
c)    Map the genes and draw the map.
d) (Not in solution below - but why can you not calculate interference? I leave that to you!)