Both of tim's parents have brown eyes, but tim has blue eyes. how is this possible?

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

You have a two-year-old daughter named chloe. you want to have enough money so you can pay for her college education when she starts college in sixteen years

How many names does the “devil’s book” have?