GENETICS - BIOL 7    Quiz 6  -  due at beginning of class: October 14, 2004   -    NAME:

1.  A geneticist's preliminary results, and the results of a second, larger study are shown below.  In both cases, known doubly heterozygous organisms were test crossed.  Analyze each experiment separately, and then draw a conclusion about the MOST LIKELY map of the two genes tested.  If the conclusions  differ, explain which you think is correct, and why you think it is more likely to be valid.

       Experiment A     Experiment B
QR        22                     220
Qr         30                     300
qr          22                     220
qR         26                     260



2.  I another, separate story, a geneticist's preliminary results, and the results of a second, larger study are shown below.  In both cases, known doubly heterozygous organisms were test crossed.  Analyze each experiment separately, and then draw a conclusion about the MOST LIKELY map of the two genes tested.  If the conclusions  differ, explain which you think is correct, and why you think it is more likely to be valid.

       Experiment A     Experiment B
DE          29                     290
De          22                     220
de           21                     210
dE          28                     280