Multiple Choice
A researcher inactivates Lefty1,a gene expressed in the anterior visceral endoderm of the mouse.What effect would inactivation of this gene have on the gastrula-stage embryo?
A) The epiblast becomes abnormally thickened throughout its cranial-caudal extent.
B) The primitive streak fails to form.
C) The endoderm fails to form.
D) The neural plate fails to form.
E) Extra primitive streaks form.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Rieger syndrome,which affects development of both the
Q3: Which tissues ingress through the cranial end
Q4: Patterning of the mesoderm involves so-called dorsalizing
Q5: Caudal dysplasia results from defects in which
Q6: In a classical experiment,a portion of an
Q7: Alagille syndrome involves a failure of proper
Q8: A man with recurrent respiratory infections and
Q9: A researcher knocks out the Tbx6 gene
Q10: A boy is admitted to the hospital