23. (8pts) You are studying Arabidopsis, a favorite plant genetic model organism. You discovered that both the T and W gene map to chromosome 1 and want to determine whether T and W are linked. You cross a wild-type plant to a tw double homozygous recessive mutant You then perform a test cross with the F1 dihybrid and get the following F2 progeny: 64 TW 57 tw 40 Tw 39 wT Using chi-squared analysis, are these genes likely to be linked? Chi square table at end of exam Chi-squared total of (observed-expected)2 for all classes expected a) Yes, p<0.05, they are 39cM apart b) Yes, p<0.05, they are 48cM apart c) No, p>0.05 they are 39cM apart d) No, p>0.05, they are 48cM apart 24. (4pts) Below are the results from an interrupted mating experiment from conjugatioin between Hfr pro+ ser+ leu+ StrS X F- pro- ser- leu- StrR showing the number of bacterial colonies found on the different media conditions at different time points. MM- minimal media Media Condition MM +Str +pro tser MM +Str +pro +leu MM +Str +ser +leu Time 200 40 30 60 85 0 0 50 20 90 135 Based on the data above from the interrupted mating, what is the order of the genes on the bacterial chromosome in reference to the fertility factor origin (O) ajo-ser+–leur pro+ b) O leu+ser+pro+ c) O pro+ leu+ser+ d) Either a or b e) Either b or c