mortality/aging
• no homozygotes born
• at E9.0 embryos have a beating heart
• homozygous embryos at E10.5 are small, necrotic and partially resorbed
|
embryo
sirenomelia
(
J:68215
)
• failure of the embryo to elongate posteriorly
• truncated body, relatively normal anterior fold-like structures and relatively normal allantois
• posterior thickening of the embryo at E7-E7.5
|
• thickened anterior and mid sections of the primitive streak
• failure of committed mesoderm cells to migrate away from the primitive streak
|
• thickened
|
• usually lacking somites
• occasionally 1-2 anterior somites, never any posterior
|
growth/size/body
limbs/digits/tail
sirenomelia
(
J:68215
)
• failure of the embryo to elongate posteriorly
• truncated body, relatively normal anterior fold-like structures and relatively normal allantois
• posterior thickening of the embryo at E7-E7.5
|