If you were most interested in knowing the genotype of your unborn baby, perhaps to find out if there were specific genetic or chromosomal problems, which prenatal test would be most appropriate?

Amniocentesis.

That is a study that is done during pregnancy and allows you to collect information about the baby's development by taking a sample of the amniotic fluid. This is the fluid that surrounds the baby in the uterus. The most common reason for an amniocentesis is to determine if the baby has a genetic condition or a chromosomal abnormality