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22. Which of the following treatments will lead to the formation of conjoined twin in frog?...

22. Which of the following treatments will lead to the formation of conjoined twin in frog?

  1. Place Nodal-expressing cells on the ventral side of the host blastula

  2. Deplete Noggin and Chordin

  3. Place BMP4-expressing cells on the ventral side of a host blastula

  4. Deplete VegT

  5. Place Wnt11-expressing cells on the ventral side of a host blastula

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