Scans of Bridges' original 1935 polytene drawings for D. melanogaster, modified from King (Handbook of Genetics, Volume 3 - Invertebrates of Genetic Interest, Plenum Press, New York, 1975):

• X chromosome

   

  • Divisions 1-2
  • Divisions 3-4
  • Divisions 5-6
  • Divisions 7-8
  • Divisions 9-10
  • Divisions 11-12
  • Divisions 13-14
  • Divisions 15-16
  • Divisions 17-18
  • Divisions 19-20

   

   

• 2L chromosome arm

   

  • Divisions 21-22
  • Divisions 23-24
  • Divisions 25-26
  • Divisions 27-28
  • Divisions 29-30
  • Divisions 31-32
  • Divisions 33-34
  • Divisions 35-36
  • Divisions 37-38
  • Divisions 39-40

   

   

• 2R chromosome arm

   

  • Divisions 41-42
  • Divisions 43-44
  • Divisions 45-46
  • Divisions 47-48
  • Divisions 49-50
  • Divisions 51-52
  • Divisions 53-54
  • Divisions 55-56
  • Divisions 57-58
  • Divisions 59-60

   

   

• 3L chromosome arm

   

  • Divisions 61-62
  • Divisions 63-64
  • Divisions 65-66
  • Divisions 67-68
  • Divisions 69-70
  • Divisions 71-72
  • Divisions 73-74
  • Divisions 75-76
  • Divisions 77-78
  • Divisions 79-80

   

   

• 3R chromosome arm

   

  • Divisions 81-82
  • Divisions 83-84
  • Divisions 85-86
  • Divisions 87-88
  • Divisions 89-90
  • Divisions 91-92
  • Divisions 93-94
  • Divisions 95-96
  • Divisions 97-98
  • Divisions 99-100

   

   

• 4th chromosome

   

  • Divisions 101-102

Click the gem to return to the homepage.