Figure 2.

Per cent egg-to-adult survival in offspring, in response to the paternal X- and Y-chromosome they did not carry. (a) X-linked paternal effects on sons from X/X dams. (b) X-linked paternal effects on daughters from attached-X dams. (c) Y-linked paternal effects on daughters from X/X dams. Note that the egg-to-adult survival of daughters from attached-X mothers (b) is reduced by about a factor of 2 compared with the survival from the other crosses, because half of the female offspring are triploid for the X and die prior to eclosion.