| Type | MGI:General | Description | female homozygotes are mildly sub-fertile, displaying a lower percent of productive matings and a reduced average litter size relative to heterozygous control females (77% vs 100%, and 3.1 +/- 1.6 vs 6.9 +/- 1.8, respectively) the decrease in fertility rate is statistically far more significant for male than for female homozygotes, whereas the reduction in average litter size is statistically comparable between sexes |