Inhibiting the expression of the FOXL9 gene in an adult female mouse causes her ovaries to transform into testes. This experimental result supports which of the following statements?
A) The Y chromosome is necessary for testicular development.
B) Gonadal differentiation can occur only during a critical period in fetal life.
C) The FOXL9 gene is essential for the expression of female sexual behavior.
D) FOXL9 regulates the sexual differentiation of the external genitalia.
E) FOXL9 is important in inhibiting testicular development.
Correct Answer:
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