Inthe chapter heredity and evolution all the crosses should be done with pencil or pen in board exam. ??plzzzzz fast its urgent

Dear student.

This is completely your choice. I would suggest you, use a pencil. This way even if an error happens, you can erase and re-draw it. This will make your answer sheet nice. If error happens in case of pen, you have to leave that particular page.

Regards.