Crooked or Straight Teeth
The shape and alignment of our teeth are largely determined by genetics. In fact, research has shown that certain genes are responsible for the development of teeth and their alignment. One of these genes is the homeobox gene, which is located on the X chromosome and is inherited exclusively from our fathers.
This means that if your father has straight teeth, you are also more likely to have straight teeth. On the other hand, if your father has crooked teeth, you may also inherit this trait. Of course, environmental factors such as diet and oral hygiene can also play a role in the development of dental issues, but genetics certainly play a significant role. The research is also mixed, and often it can depend on jaw size and shape and many other factors, which you could inherit from either parent. (1)