Multiple choice

By which technique of depiction of karyotypes are fluorescent patterns obtained?

  1. G-banding

  2. C-banding

  3. Q-banding

  4. R-banding
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Q-banding is a fluorescent pattern obtained using quinacrine for staining. Quinacrin (atebrin) binds both regions rich in AT and in GC, but only the AT-quinacrin-complex fluoresces. Since regions rich in AT are more common in heterochromatin than in euchromatin, these regions are labelled preferentially.

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