题目内容

Temperature-dependent sex determination (TSD) involves a process in which the temperature of the embryo's environment influences its sex development into a male or female. One cause of TSD is the enzyme aromatase. It converts sex steroids from male sex hormones to female hormones. Reptiles, such as turtles and crocodiles, exhibit temperature-dependent sex determination. During the thermosensitive period, if the temperature increased then there would be higher levels of aromatose activity. Which of the following can be concluded from the diagram?

A. The Sox9 gene indirectly regulates aromatase activity.
B. The activation of FoxL2 gene indirectly initiates aromatase expression.
C. The uptake of estradiol will result in the increased release of testosterone.
D. The temperature required to produce female offspring is significantly lower than the temperature to produce male offspring.

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