Cell lineage of regularly developing sea urchin embryo: No2

Cell name

 No2

Cleavage number

 4

Number of cells after cleavage

 16

Cleavage direction (with respect to the A/V axis)

 vertical

Mother cell

 No

Sister cell

 No1

Progeny

 No2u, No2l

Tier

Prospective territory

 Oral ectoderm
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