How would you describe fetal development and its involvement with determining whether offspring are male or female?

Early in fetal development, reproductive structures are initially undifferentiated rather than distinctly male or female. Genetic signals, especially those associated with the Y chromosome, lead to hormone production that guides development toward male anatomy; without those signals, development generally follows the female pathway. So hormones help guide an initially undifferentiated fetus toward male or female reproductive development, making choice B correct.

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