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  Section: Biotechnology Methods » Cell Biology and Genetics
 
 
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Mounting of the Sex Comb in Drosophila Melanogaster

 
     
 
Content
Cell Biology and Genetics
  Cell Cycles
  Meiosis in Flower Buds of Allium Cepa-Acetocarmine Stain
  Meiosis in Grasshopper Testis (Poecilocerus Pictus)
  Mitosis in Onion Root Tip (Allium Cepa)
  Differential Staining of Blood
  Buccal Epithelial Smear and Barr Body
  Vital Staining of DNA and RNA in Paramecium
  Induction of Polyploidy
  Mounting of Genitalia in Drosophila Melanogaster
  Mounting of Genitalia in the Silk Moth Bombyx Mori
  Mounting of the Sex Comb in Drosophila Melanogaster
  Mounting of the Mouth Parts of the Mosquito
  Normal Human Karyotyping
  Karyotyping
  Black and White Film Development and Printing for Karyotype Analysis
  Study of Drumsticks in the Neutrophils of Females
  Study of the Malaria Parasite
  Vital Staining of DNA and RNA in Paramecium
  Sex-Linked Inheritance in Drosophila Melanogaster
  Preparation of Somatic Chromosomes from Rat Bone Marrow
  Chromosomal Aberrations
  Study of Phenocopy
  Study of Mendelian Traits
  Estimation of Number of Erythrocytes [RBC] in Human Blood
  Estimation of Number of Leucocytes (WBC) in Human Blood
  Culturing Techniques and Handling of Flies
  Life Cycle of the Mosquito (Culex Pipiens)
  Life Cycle of the Silkworm (Bombyx Mori)
  Vital Staining of Earthworm Ovary
  Culturing and Observation of Paramecium
  Culturing and Staining of E.coli (Gram’s Staining)
  Breeding Experiments in Drosophila Melanogaster
  Preparation of Salivary Gland Chromosomes
  Observation of Mutants in Drosophila Melanogaster
  ABO Blood Grouping and Rh Factor in Humans
  Determination of Blood Group and Rh Factor
  Demonstration of the Law of Independent Assortment
  Demonstration of Law of Segregation

The sex comb is a specialized structure present exclusively in the forelegs of male flies. Location, size, and structure vary from species to species. An adult Drosophila has 3 pairs of legs:
  • Forelegs
  • Midlegs
    and
  • Hindlegs: In adult males, the forelegs have a comblike structure with chitinized black teeth called the sex comb. It is present in the first tarsal segment of the forelegs of the males. It is absent in the females. The sex comb helps the male hold the female during copulation or mating.
Materials
  • Glass slides
  • Cover slip
  • Needles
  • Male flies
  • Glycerine
  • Dissecting microscope

Procedure
  1. Etherize the flies and separate the males.
  2. Separate the forelegs using needles under the dissecting microscope.
  3. Put a drop of glycerine on the forelegs and place the cover slip on top.
  4. Search and observe the sex comb on the first tarsal segment.
 
     
 
 
     




     
 
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