What is the odds of having a twin if you mom was a twin and dad was a twin and grandmother had twins?

The odds are very likely that you will be or have a twin. That is because its been in youre blood streem for 2 or more generations. the chances are really 50 50.

answer 2: i am not really sure. see, i am a twin, and nobody in my family, not even any of my ancestors, have been twins. i mean, you have a better chance than none for having twins, So yeah it is 50 50 really! hope I could help xx