The 3-point mapping cross was conducted and the following data were obtained 94

Question

The 3-point mapping cross was conducted and the following data were obtained 94 normal body, forked bristles. normal eyes 100 tan body, normal bristles. yellow eyes 52 tan body, normal bristles. normal eyes 48 normal body forked bristles yellow eyes 348 normal body, normal bristle. normal eyes 367 tan body forked bristle yellow eyes 9 tan body forked bristles. normal eyes 12 normal body normal bristles yellow eyes Calculate the map distance between the three (3) gene loci (separately not here) and then give the resulting map distances below

Explanation / Answer

The gene order is    normal body------------- normal eyes -----------normal bristles

distance between normal body------------- normal eyes is 20.8mu

and normal eyes -----------normal bristles is 11.7mu

so normal body------20.8mu------- normal eyes ------11.7-----normal bristles

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