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Biology · 2025 · 3 marks
CBSE 2025 · Region 1 · Set 1 · Q26
Shyam and Radha are expecting their first child with Radha being in her second month of pregnancy with no complications. Shyam's family has a history…
Shyam and Radha are expecting their first child with Radha being in her second month of pregnancy with no complications. Shyam's family has a history of cystic fibrosis while Radha's family has a history of Down's syndrome, leading to a concern that the baby may have one of these conditions.
(a)
Suggest and explain a way of testing if their baby is at risk for any genetic disorders.
(b)
In case of presence of one or both of the abnormalities and posing a risk to the mother's health, mention one possible option for them to consider. Is that option safe for Radha at the current gestational age ? Justify.
(c)
Under what conditions is the process mentioned in (b) illegal ?
Marking-scheme solution
(a)
Amniocentesis,
In amniocentesis some of the amniotic fluid of the developing embryo is taken to analyse the foetal cells and dissolved substances to test the presence of genetic disorders.
(b)
Medical Termination of Pregnancy/MTP,
Yes
as MTP is comparatively safe upto $\displaystyle 12$ weeks (the first trimester) of pregnancy.
(c)
When it is performed by quacks / if foetus is a normal female followed by MTP leading to female foeticide
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