What will occur if a morula divides into three masses of cells?
A) The resulting embryos will develop severe birth defects due to missing genes.
B) Normal identical triplets will be born.
C) Three distinctly different embryos will develop, depending on which homeoboxes went with which mass of cells.
D) The resulting embryos will die.
E) The resulting embryos will develop, but they may be missing some organs based on which germ layers were transferred with each section.
Correct Answer:
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Q21: In the 1920s, two German embryologists, Hans
Q22: During mammalian development, a
A) morula becomes gastrula.
B)
Q23: At what stage does a human embryo
Q24: At which stage is the human embryo
Q25: A human embryo is known as a
Q27: Based on experiments with amphibian embryos, Spemann
Q28: In humans, implantation occurs
A) when the embryo
Q29: Induction refers to
A) the formation of the
Q30: Cells differentiate during development because
A) genes respond
Q31: The birth defect spina bifida results in
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