Germinal layer formed from trophoblast of mammalian blastocyst is

Options

A. Ectoderm
B. Endoderm
C. Mesoderm
D. None of the above

Answer

D

Explanation

• The blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called the inner cell mass.
• The trophoblast layer then gets attached to the endo metrium and the inner cell mass gets differrentiated as the embryo.
• The trophoblast does not participate in formation of embryo.