Question

Chromosome banding was discovered by

• A. Casperson et al
• B. Muller
• C. Berg et al
• D. Christian de Duve.

Answer 1

The correct option is A Casperson et al

• Chromosome banding is a method by which the characteristic patterns of chromosomes are identified as horizontal bands like structures (barcodes)
• The banding patterns give each chromosome a distinctive appearance thus, the 22 pairs of autosomes and the X and Y chromosomes in humans are easily identified and distinguished without uncertainty.
  
• It is of different types- G-banding or Giemsa banding, C-banding, Q-banding, etc.
  
• The Q-banding method was developed by Caspersson et al. in the year 1968.
  
• In this technique, the chromosomes were stained with Quinacrine mustard which shows bright and dark zones under UV light.
• This banding technique is used to identify human chromosomes from the mice chromosomes.
  So, the correct answer is 'Casperson et al'