GENE AND CHROMOSOME MUTATIONS 

 Table of Negative Linkage Data 



245 



Crossover per cents greater than 57.3 are not given in Stevens' tables. 

 T.\BLE OF Negative Linkage Data. — (Continued) 



* Crossover per cents greater than 57.3 are not given in Stevens' tables, 

 t Only the ^^ fle.xed mice were classified as to whether they were tj'pe or rodless. 

 X Only the 28 hydrocephalus- 1 mice were classified as to whether they were type or rodless. 

 § Tests of i4of the sh-2sh-2 Ily-i mice for the presence of hy-i showed more than the e.xpected 

 number of crossovers in this group. 



]] The original cross was c X In: the expected F: ratio is 190:63:85. 



% Waved-i as well as rex was involved in this backcross, giving an expected ratio of 3 : 3 : i : i . 



