PZ Myers. 2007 Mar 01. Week 7: 26 February-1 March. <http://genetics.pharyngula.org/gen/commentsweek_7_26_february_1_march/>. Accessed 2008 Aug 20.
Posted on M00o93H7pQ09L8X1t49cHY01Z5j4TT91fGfr on Thursday, March 01, 2007
Week 7: 26 February-1 March
Here are the results of the recent fly cross for all of the lab sections. There are a few errors in the results, largely due to experimenter error: a few groups did not clear the bottles of the parentals before the F1s eclosed. We'll make very sure that that mistake isn't repeated with the next cross.
Results for the ♀ wmf x ♂ +++ cross:
| Phenotype | Total |
| ♂ +++ | 2 |
| ♂ wmf | 69 |
| ♀ +++ | 111 |
| ♀ wmf | 0 |
Note that the progeny in blue are the F1 flies that we are using for our next cross.
Results for the ♀ +++ x ♂ wmf cross:
| Phenotype | Total |
| ♂ +++ | 463 |
| ♂ wmf | 10 |
| ♀ +++ | 635 |
| ♀ wmf | 10 |
Be sure to get these numbers into your notebooks. You might also try doing some chi square tests. What numbers would you expect if these genes were not X-linked, and are your results significantly different from that? What numbers would you expect if, as I've told you, they are X-linked? Are the differences in the numbers of males and females significant?