Alaina is pregnant and has undergone prenatal testing. The initial tests raised some red flags, and a subsequent DNA test confirmed that the fetus does in fact have three copies of chromosome 21, or:
Down syndrome.

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.