1. These signals, in turn, allow for the formation of embryonic tissues . 2. The testicular form is expressed in embryonic tissues , tumor cells, and the testis. 3. It is also expressed in ascites and various embryonic tissues . 4. The AVE is an extra-embryonic tissue , key to the establishment of the anterior-posterior body axis. 5. Research on embryonic tissue is generally banned in China, according to the Chinese Health Ministry. 6. PEG10 is a paternally expressed imprinted gene that is expressed in adult and embryonic tissues . 7. Extra-embryonic tissue preferentially inactivate the paternal X chromosome. 8. The ovaries are the female gonads; they develop from the same embryonic tissue as the testicles. 9. Thus, a living plant always has embryonic tissues . 10. It did keep them from forming normal embryonic tissues , leaving them as large, yolk-filled cell masses.