| Type | MGI:General | Description | homozygotes exhibit absence or reduction of mammary buds between E11.5 and E13.5 no mammary buds are detected at E12.5, although at E13.5 one of seven mutants displayed a single, small pair of mammary buds at the level corresponding to bud number 2, and a second mutant had a single, unilateral bud in a similar position; however, these appeared less organized relative to wild-type mammary buds |
