Medical Genetics They observed that the mRNA was much shorter in length and thus was not encoded as an equal colinear segment of the DNa molecule. Instead, large loops of unhybridized dNa (A, b and c in figure) were seen. Their interpretation was that the mature messenger rNa was derived from four discontinuous segments on the viral dnaMedical Genetics They observed that the mRNA was much shorter in length and thus was not encoded as an equal colinear segment of the DNA molecule . Instead, large loops of unhybridized DNA (A, B and C in figure) were seen. Their interpretation was that the mature messenger RNA was derived from four discountinuous segments on the viral DNA