Tracy is ten weeks pregnant, and she wants to test the fetus for various genetic disorders as early as possible. Tracy's doctor will likely recommend which of the following tests?

Amniocentesis is typically performed later in pregnancy, usually between 15 and 20 weeks. This test involves extracting amniotic fluid to analyze fetal cells for genetic disorders. While it is a reliable test, it does not meet Tracy's request for early testing.

An ultrasound is primarily a diagnostic tool used to visualize the fetus's development and anatomy, rather than a genetic testing method. While it can detect some physical abnormalities, it does not provide specific genetic information, making it unsuitable for Tracy's needs.

The Bayley Scales are developmental assessments used for infants and toddlers to measure cognitive and motor skills. This is not a prenatal test and is irrelevant to assessing genetic disorders in an unborn fetus.

The Apgar test is conducted immediately after birth to evaluate a newborn's physical condition, including heart rate, respiration, and responsiveness. It has no relevance to prenatal genetic testing and cannot provide information about potential genetic disorders while the fetus is still in utero.