What’s it take to for a zygote to become a boy? A girl?

Using this text book :
Breedlove, S. M., Watson, N. V., & Rosenzweig, M. R. (2013). Biological Psychology: An Introduction to Behavioral, Cognitive, and Clinical Neuroscience (7th edition). Sunderland, MA: Sinauer Associates, Inc.
Answer the following questions in short notes:
Behavioral Neuroscience Final Review 2017

• Hunger, satiety, and set-point (of weight) in the hypothalamus

• Endotherms vs. ectotherms

• Schizophrenia biological markers

• Treatment of depression

• Thirst, detection and regulation in the body and brain

• What’s it take to for a zygote to become a boy? A girl?

• Sex/Gender and the brain.

• Feedback in the muscular system

• The pyramidal and extra-pyramidal motor systems

• Hormones, stress and emotion

• Stages of development of the nervous system

• Visual pathway from eye to brain
• Breedlove, S. M., Watson, N. V., & Rosenzweig, M. R. (2013). Biological Psychology: An Introduction to Behavioral, Cognitive, and Clinical Neuroscience (7th edition). Sunderland, MA: Sinauer Associates, Inc.
  Answer the following questions in short notes:
  Behavioral Neuroscience Final Review 2017