Question

the prefix \di-\ means two. why do you think fraternal twins are called dizygotic?

Explanation:

Fraternal twins result from two separate eggs (ova) being fertilized by two separate sperm. The prefix "di - " (meaning two) combined with "zygote" (a fertilized egg) gives "dizygotic". So, the term "dizygotic" reflects the fact that fraternal twins come from two zygotes (two fertilized eggs).

Answer:

Fraternal twins are called dizygotic because they develop from two separate zygotes (two fertilized eggs), and the prefix "di - " (meaning two) is combined with "zygote" to form the term.