KROK 1 Stomatology 2013 – Question 148 · KROK (Dentistry)
Detection of X-chromatin in somatic cells is used for the quick diagnosis of hereditary diseases associated with a change in the sex chromosome number. Vast majority of a man’s cells have three X-chromatin bodies. What is the man’s karyotype?
- A. 49, XXXXY
- B. 48, XXXY
- C. 46, XY
- D. 45, X
- E. 47, XXY
Hint
Use the rule that the number of Barr bodies equals the number of X chromosomes minus one.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.