MDCAT Biology MCQ #1188

A doctor is using genetic testing to diagnose a genetic disorder in a fetus. What is the primary source of fetal DNA for this test?

MDCAT Biology MCQ #1188

  1. Question 1

    Q1. A doctor is using genetic testing to diagnose a genetic disorder in a fetus. What is the primary source of fetal DNA for this test?

    • A) Amniotic fluid
    • B) Maternal blood
    • C) Chorionic villus sampling
    • D) Fetal tissue

    Answer: Amniotic fluid

    Explanation: Amniotic fluid contains fetal cells; chorionic villus sampling is also used but involves placental tissue.