Establishment of the Dorsal-Ventral Axis of the Drosophila Embryo

question 12

Multiple Choice

Establishment of the dorsal-ventral axis of the Drosophila embryo:

• A)involves the production of localized DL mRNA on the ventral side of the developing embryo.
• B)occurs via at least two paracrine signals transmitted between the developing oocyte and the surrounding somatic follicle cells.
• C)involves the zygotically expressed DL morphogen.
• D)depends on the activity of anterior-posterior morphogens,such as BCD or HB-M.
• E)None of the answer options are correct.

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