Do you think it's morally or ethically right for the parents to conceive a child soley for the purpose of using him/her as a donor for another child?

 NO

Is it also morally or ethically right to select a specific characteristics of genetics that you want for a child you want to conceive(instead of say head colour or IQ, you selected out one with a specific genetics.)?

NO

Do parents have the right to force a child to help another person given there will be some suffering invovled?

NO

I knew a lady whose husband had a genetic condition (it didn't affect his health) and for their second child (girl, 1st one was a boy) they used genetic selection (or whatever it is called) to ensure their genetic condition wasn't passed on to the baby.

I don't see anything wrong with that.