Genotypes of the Various Stages of Gestation
| . | n . | +/+ . | +/mu . | mu/mu . |
|---|---|---|---|---|
| E10.5 | 20 | 7 | 9 | 4 |
| E11.5 | 56 | 16 | 25 | 15 |
| E12.5 | 373 | 99 | 202 | 72 |
| E13.5 | 55 | 12 | 36 | 7 |
| E14.5 | 25 | 6 | 19 | 0 |
| E18.5 | 17 | 5 | 12 | 0 |
| Newborn | 18 | 7 | 11 | 0 |
| 4 wks | 139 | 55 | 84 | 0 |
| . | n . | +/+ . | +/mu . | mu/mu . |
|---|---|---|---|---|
| E10.5 | 20 | 7 | 9 | 4 |
| E11.5 | 56 | 16 | 25 | 15 |
| E12.5 | 373 | 99 | 202 | 72 |
| E13.5 | 55 | 12 | 36 | 7 |
| E14.5 | 25 | 6 | 19 | 0 |
| E18.5 | 17 | 5 | 12 | 0 |
| Newborn | 18 | 7 | 11 | 0 |
| 4 wks | 139 | 55 | 84 | 0 |
Genotypes were examined by Southern blot analysis using the probe shown in Fig 1. None of the data include resorbed or dead embryos. The morning on which a vaginal plug was identified was counted as day 0.5 of gestation.