KROK 1 2013 – Question 82 · KROK (Medicine) · Biology
Healthy parents with unremarkable family history have the child with multiple developmental defects. Cytogenetic analysis revealed the trisomy 13 in the somatic cells (Patau syndrome). What phenomenon has caused the defects?
- A. Chromosomal mutation
- B. Recessive mutation
- C. Dominant mutation
- D. Abnormal gametogenesis
- E. Somatic mutation
Hint
Ask how a whole extra chromosome can reach every cell of a child whose parents are healthy and have no family history.
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