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:
Correct answer: D. Amniocentesis
- A. Ultrasound
- B. Gene therapy
- C. Tissue culture
- D. Amniocentesis
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.
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About Embryonic Development
Embryonic development begins after fertilization with cleavage and formation of the morula and blastula, followed by gastrulation and the establishment of germ layers. It includes organ formation, tissue differentiation and early growth, rather than the later increase in size associated with postnatal development.
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