Figure 1.
A length change mutant at the paternally derived Ms6hm allele in F1 mice born to unirradiated males. An unirradiated C3H/HeN male was mated with a C57BL/6N female, and F1 mice were analyzed. Southern blotting of a litter of F1 mice is shown. P/M is the mixture of DNA from both male and female parents. A length change mutation of the paternal C3H/HeN allele of the second mouse is indicated by an arrow.