yes withouth a doubt
separate them
None Mate
Yes, yes they will.
Yep.
Parakeets do not mate for life. They are monogamous during the breeding season, but they may choose different mates in subsequent seasons.
Yes they do. They don't know the difference. Refer to link below.
If they have a mate, yes, unless their human purposely separates them from their mate, the mate dies, etc.
a box
Brothers and sisters, of any species of animal, cannot breed.
They mate or do a jig then they lay the eggs and sit on them
They mate.
I don't know any animal that is really fussy about where to have sex - including parakeets.