Blood Groups
Erythroblastosis foetalis can occur if:
Select the correct option:
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About This Question
- Subject
- biology
- Chapter
- body fluids and circulation
- Topic
- blood groups
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Mother is Rh- and Foetus is Rh+
- Scenario: Rh-incompatibility occurs when an Rh− mother is sensitized by Rh+ blood, usually during a previous pregnancy.
- Mechanism: The mother's immune system produces antibodies against the Rh factor. During a subsequent pregnancy with an Rh+ foetus, these antibodies can cross the placenta and destroy the foetal RBCs.
- Result: This causes severe anaemia and jaundice in the foetus, a condition known as erythroblastosis foetalis.
- Conclusion: It occurs only in an Rh− mother carrying an Rh+ foetus.
This medium difficulty biology question is from the chapter body fluids and circulation, covering the topic of blood groups. It appeared in the 2025 exam.
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