PikachuLover, go to the link below. It will take you to this page's "Breeding" page. It will tell you all you need to know about breeding Pokémon. The basics are:
Pokémon must be of the same "Egg Group"
Eggs are the same pokémon of the female
Eggs inherit moves from the Male if possible (the link describes it more)
Females pass on abilities
To answer your question, your Pokémon baby will be a Deino.