mortality/aging
• most embryos appear arrested in development at E7.25-E7.75, although a few embryos appear to develop further; these never exceed the early somite stage (E8-8.5)
|
embryo
• most mutant embryos undergo little intra-embryonic development with a variable reduction of the embryo body, ranging from complete absence to developing up to the 4-6 somite stage
• in contrast, mutant extraembryonic tissues appear similar in size and morphology to controls at all stages examined
|