In Drosophila the genes twist, snail, rhomboid and sog are expressed at differing positions along the dorsal-ventral (DV) body axis. Which of the following contributes to this phenomenon? O The embryo has a ventral-to-dorsal (high-to-low) gradient of Toll receptor on its surface. O Dorsal protein can activate the transcription of all four genes. When activated, the Toll receptor signal transduction pathway phosphorylates the Dorsal protein. O These four genes have Snail-binding sites of differing chemical affinity. The Snail protein activates transcription of rhomboid and sog in ventral tissues. Answer Submitted: Your final submission will aded when th tim. limit in Drouiqua

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