3.31 Unit Review

Front

What is an STR?

Back

Short (2–5 base pair) sequences that are repeated one next to each other in non-coding portions of the DNA.

Front

What does horizontal gaze nystagmus assess in a field sobriety test?

Back

The ability to track an object with the eyes alone.

Front

How does ninhydrin develop latent fingerprints?

Back

Ninhydrin reacts with amino acids in the perspiration of the fingerprint.

Front

Which structure is larger in animal hairs than in human hairs?

Back

Medulla.

Front

What is the most commonly used method in modern DNA typing?

Back

STR (Short Tandem Repeats).

Front

Define the term 'medulla' in the context of hair structure.

Back

The central core of a hair strand, which can vary in size and presence between different species.

Front

What is the purpose of a field sobriety test?

Back

To assess a person's physical and cognitive abilities to determine if they are impaired.

Front

Explain the role of amino acids in fingerprint development using ninhydrin.

Back

Amino acids present in perspiration react with ninhydrin to produce a visible color change, revealing the fingerprint.

Front

What is the significance of non-coding DNA in genetics?

Back

Non-coding DNA, including STRs, plays a role in genetic diversity and can be used in DNA profiling.

Front

Describe the process of DNA typing using STRs.

Back

DNA typing using STRs involves amplifying specific short tandem repeat regions of DNA to create a unique genetic profile.