Figure 213

Schematic diagram of male sex development and hormonal influence on developing reproductive organs. This diagram illustrates three levels on which the sex of the developing embryo is determined. The genetic sex is determined at the time of fertilization; gonadal sex is determined by activation of the SRY gene located on the short arm of chromosome Y; and hormonal sex is determined by a hormone secreted by the developing gonad. The diagram shows the influence of Mullerian-inhibiting factor (MIF), testosterone, and dihy-drotestosterone (DHT) on the developing structures.

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