Cells nearest the source of a morphogen are exposed to a high concentration of morphogen and express one set of genes. Cells farther from the source of the morphogen are exposed to a lower morphogen concentration, and express different genes. This is a description of which developmental process?
a. embryonic induction
b. fertilization
c. apoptosis
d. cleavage
e. gastrulation
a
Biology & Microbiology
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