Purpose of selection operators

[kc_@ejazzmail.com]

Hi there

    From several research papers I've come across, selection operators
performing seem to perform 2 roles:

1) selection of individuals (parents) to be mated ( the actual mating /
recombination is handled by a separate mating operator)

2) selection of individuals for the next generation.

Qn:
1) Are my observation correct ? Does both cases always apply? ( plz
elaborate when it does and doesn't )

2) Are the main steps selection - crossover - mutation -> New pop.
always in this order?

    TIA!

ken