Chiasma frequency and nondisjunction in heteromorphic bivalents: meiotic behavior in T(1;13)70H/T(1;13)1Wa mice as compared to T(1;13)70H/T(1;13)70H mice.

Two different reciprocal translocations between chromosomes 1 and 13 in the mouse, T(1;13)70H and T(l;13)lWa, were intercrossed, resulting in T(l;13)70H/T(l;13)lWa animals, possessing two heteromorphi