1 





Fig. 3. From T6 mouse with one characteristic ultra-short chromosome due 



to a translocation. 



i 



Fig. 4. From CBA mouse irradiated with 950 r and treated ^^t^^ ^^^f .^^".^"^ 



iniection of spleen from T6 mouse; showing typical damage from radiation^ 



dicentric chromosomes and acentric fragments. 



