To prepare slides of scale pattern of human hair. (E)

Practicals of Forensic Zoology
By
Dr. Nutan D. Rathod
Head, Department of Zoology,
KCE’s Moolji Jaitha (Autonomous) College, Jalgaon

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1. Title : To prepare slides of scale pattern of human hair. (E) Dr. Nutan D. Rathod Head, Department of Zoology, KCE’s Moolji Jaitha (Autonomous) College, Jalgaon

2. Objective To prepare a slide of human hair To observe and identify the scale pattern of the hair under a microscope

3. Materials Required Clean glass slide Cover slip Forceps Scissors Human hair strand Nail polish / clear adhesive Compound microscope

4. Procedure Take a clean glass slide Apply a thin layer of clear nail polish on the slide Place a strand of human hair over the wet polish Allow it to dry completely Gently remove the hair using forceps Observe the impression left on the slide under the microscope

5. Observations The impression of the cuticle scales can be seen The scale pattern appears similar to overlapping roof tiles Pattern observed: Imbricate scale pattern

6. Types of Hair Scale Patterns Imbricate: Overlapping like roof tiles (common in humans) Coronal: Crown-like (in small rodents and bats) Spinous : Petal-like (in cats, seals, etc.)

7. Conclusion Human hair shows an imbricate scale pattern This pattern is useful in forensic identification Cuticle patterns vary between species

8. Applications Used in forensic science to identify species Helps in crime scene investigations Can distinguish human vs animal hair

9. Precautions Use clean equipment to avoid contamination Let the nail polish dry fully before removing hair Handle slides and microscope carefully

10. References Biology/Forensic Science Textbook Lab Manual