Assertion: zygote's cell | /r/MadeOf | developing embryo
Facets:
value: rarely
type: DEGREE
Source sentences:
text: A ball of cells containing a trophoblast and a developing embryo.
text: Of note, polyploid cells may be compromised in genetic totipotency, as supported by the fact that cells of a tetraploid embryo rarely contribute to the development of the embryo proper .