TDF plays a crucial role in the development of male characteristics during embryonic development. It triggers the differentiation of undifferentiated gonads into testes. This process leads to the production of testosterone and other male sex hormones, ultimately leading to the development of male reproductive organs and secondary sexual characteristics.
Here's how it works:
1. Presence of Y chromosome: In males, the presence of the Y chromosome means the SRY gene is present.
2. SRY gene activation: The SRY gene is activated during embryonic development.
3. TDF production: The SRY gene produces TDF protein.
4. Gonad differentiation: TDF triggers the differentiation of undifferentiated gonads into testes.
5. Testosterone production: The testes start producing testosterone, which further promotes the development of male characteristics.
Without TDF, the undifferentiated gonads would develop into ovaries, leading to female development.
Therefore, TDF is a critical factor in the determination of sex in mammals.
