The primary embryonic organizer is most likely initiated by
A) the yolk.
B) Tcf-3 protein.
C) $\beta$-catenin.
D) cAMP.
E) None of the above

Question

Quizplus · Accepted Answer

The primary embryonic organizer, also known as the Spemann-Mangold organizer, is initiated by the interaction of certain signaling molecules including F1F1F1S1F1F1F10-catenin, which activates the expression of genes involved in axis formation and differentiation. Tcf-3 protein is involved in regulating the expression of target genes downstream of F1F1F1S1F1F1F10-catenin. Yolk is an important nutrient source for developing embryos but does not play a direct role in embryonic organization. cAMP is a signaling molecule that can activate certain pathways involved in cell differentiation but is not directly involved in initiating the primary embryonic organizer.

The Primary Embryonic Organizer Is Most Likely Initiated by A) β\betaβ

The Primary Embryonic Organizer Is Most Likely Initiated by
A) $\beta$