It helps to have the mom on the egg to incubate the egg, unless you have an alternate incubator in which case the mom is obsolete in this regard. If left laying still and unwarmed it will not end well. Eggs need to be slowly rotated and kept at a warm temperature to develop healthy living little birds inside.
no no no
not in the wild, but most of the time in they will in captivity they will. no one knows why.
sometimes
vff
its not a good idea because the new one will probably get too cose to the egg
to keep the egg warm, and to protect it.
YES!
check
no. it is just like touching an egg
After the parakeet molts and starts looking older it will soon enough lay an egg.
Yes. But it will not be fertile.
18 days