Answer 1

Not necessarily because the egg still has a 1/8192 chance of being shiny. The only thing the parents effect in the offspring are the IVs, stats it is born with, and the type of pokemon it is.

Answer 2

What charizard said is true, breeding shiny Pokemon is just like breeding regular Pokemon, the shiny chance never changes from 1/8192. However, if one of the parent pokemon is originally from a foreign game, the chance of shininess in the baby newly hatched pokemon is drastically increased, this is known as the mesuda method.