Forensic Trace Evidence Flashcard

Front

What is the most important feature of hair for species identification?

Back

Scale pattern.

Front

What are the three layers of the hair shaft?

Back

Cuticle, cortex, and medulla.

Front

Under what condition is it certain that two fabrics share a common origin?

Back

If their fibers can be fitted together at their torn edges.

Front

What is the main characteristic used to differentiate between human and animal hair?

Back

Medullary index.

Front

Which property should NOT be examined when comparing two synthetic fibers?

Back

Medullary index.

Front

What is the cuticle in hair?

Back

The outermost layer of the hair shaft that protects the inner layers.

Front

Define medullary index.

Back

The ratio of the diameter of the medulla to the diameter of the hair shaft.

Front

What is the role of the cortex in hair?

Back

The cortex contains the pigment and provides strength and elasticity.

Front

How can color be misleading in forensic hair analysis?

Back

Color can vary widely among individuals and does not provide definitive identification.

Front

What is the significance of fiber type in forensic analysis?

Back

The same fiber type indicates a higher likelihood of a common origin.