Figure 2.

Pedigree of recipient W male 5486 demonstrating transmission of transgene for 3 generations. Diagonal lines in 5486 indicate only some seminiferous tubules stain blue and express the transgene. Solid symbols indicate the transgene is expressed in these progeny. Numbers in boxes and circles are identification numbers of individual animals. In the first generation, the numbers in diamonds are population size; 4 animals contained the transgene and 103 were negative. None of these animals were assigned identification numbers or mated. At weaning, females and males were caged separately and then analyzed for the transgene; therefore, identification numbers for each sex are consecutive.