Table 3.
Determining the Time of Death of Chromosome 4 (117–281) Lethal Mutants
| Line Name | # Litters examined | Stages examined | # Homozygous mutantsa | # Heterozygous mutants or balancer monozygotes | # Resorbed embryos | Unable to determineb | Stage of death | Notes on mutants |
| l4Jus19 | 1 | E12.5 | 2 | 2 | 8 | 0 | E9.5–12.5 | Dead at E12.5 |
| l4Jus22 | 1 | E11.5 | 0 | 7 | 1 | 0 | Not determined | |
| l4Jus23 | 4 | E11.5–12.5 | 0 | 21 | 16 | 0 | Before E11.5 | |
| l4Jus24 | 6 | E7.5–13.5 | 0 | 23 | 11 | 1 | Before E7.5 | |
| l4Jus25 | 3 | E10.5, E12.5 | 3 | 17 | 7 | 0 | E9.5–12.5 | Smaller, cardiac defects |
| l4Jus26 | 6 | E8.5–12.5 | 5 | 30 | 15 | 1 | E5.5–7.5 | Smaller, developmental delay |
| l4Jus27 | 8 | E7.5–12.5 | 0 | 38 | 5 | 4 | Before E8.5 | |
| l4Jus28 | 15 | E8.5–10.5, E12.5 | 25 | 89 | 3 | 0 | E9.5–12.5 | Vascular defects |
| l4Jus29 | 2 | E8.5, E12.5 | 3 | 11 | 2 | 0 | Before E7.5 | Fail to grow after implantation |
| l4Jus30 | 7 | E10.5–12.5 | 16 | 45 | 5 | 0 | E9.5–12.5 | Craniofacial defects |
| l4Jus31 | 8 | E9.5, E12.5, P11–25 | 15 | 36 | 6 | 0 | Post-natal | Neurological defects |
a After E12.5 mutant embryos were identified by lack of eye pigment and heterozygous mutants or balancer homozygotes were identified by eye pigmentation
b Embryos were lost during the dissection