A 16 weeks pregnant woman, who already has a son with haemophilia, visits a genetic counsellor to know about the genetic health of her second baby.The diagnostic test that the genetic counsellor refers to the woman would be:

Explanation

The correct answer is amniocentesis. Amniocentesis is a diagnostic test typically performed between 15 and 20 weeks of pregnancy. It involves taking a small sample of the amniotic fluid surrounding the fetus, which contains fetal cells that can be analyzed for genetic conditions such as haemophilia.Ultrasound is not suitable for detecting genetic conditions; it is used for visualizing the fetus and assessing its development. Gene therapy is a treatment method and not used for diagnosis. Tissue culture is a laboratory technique and not applicable for prenatal genetic testing.