Fig. 5: Average number of progeny per female. Of the females successfully fertilized, it is clear that the ome1 mutant males produced fewer living progeny/female. Note the apparent “hybrid vigor” illustrated in the heterozygote female crosses. In this case as well, however, the ome1 males produced fewer progeny per female than the wildtype males. With ome1 homozygote females a two tailed student's t test gave: P = 7.7x10-5, with wildtype females: P = 2.3 x 10-6, heterozygote females: P = 9.9 x 10-3, where P is the probability that the samples are taken from the same population and therefore have equal means. Number of females is the same as in Fig. 4.