How did Sophie's and David's upbringing shape their characters? Refer closely to Chapters 1-2 of The Chrysalids.

Chapter Two in particular makes it clear the kind of world
that David and Sophie are living in. We are presented with a world in which abominations
or mutants are deplored and to be avoided. If they are discovered, there are serious
ramifications. Note what happens when "Offences" are discovered in David's
household:

We
would all kneel while he proclaimed our repentance and led prayers for forgiveness. The
next morning we would all be up before daylight and gather in the yard. As the sun rose
we would sing a hymn while my father ceremonially slaughtered the two-headed calf,
four-legged chicken, or whatever other kind of Offence it happened to be. Sometimes it
would be a much queerer thing that
those...

Thus we can
understand the atmosphere of profound secrecy and concern that David and Sophie are
brought up in. Both, of course, have reason to fear discovery of the way in which they
are "Offences," just as the two-headed calf is an offence. The consequences of discovery
are terrifying.

This is why the characters of David and
Sophie are characterised by the necessity of keeping a dreadful secret that could
endanger their lives and the lives of those around them. Living in such a society that
is so vigilant for "Offences" does not bode well for either of them, and makes the
threat of discovery ever-present.