The video tutorial provides an overview of contact DNA, emphasizing its unique characteristics and how it differs from other types of DNA. The content is concise and focused on explaining the concept of contact DNA without delving into other DNA types.

What is the primary focus of contact DNA?

• To identify genetic disorders

• To trace physical contact between individuals

• To determine ancestry

• To study DNA mutations

Why is contact DNA important in forensic science?

• It helps in understanding human evolution

• It is used to predict future crimes

• It can link a suspect to a crime scene

• It helps in identifying unknown substances

What does the term 'contact DNA' refer to?

• DNA extracted from hair follicles

• DNA obtained from blood samples

• DNA left behind from physical contact

• DNA used in genetic engineering

Which of the following is a challenge associated with contact DNA?

• It requires a large sample size

• It is not affected by environmental factors

• It is difficult to extract from surfaces

• It is only applicable to living organisms

Which statement is true about the limitations of contact DNA?

• It is always easy to interpret

• It can be contaminated easily

• It is unaffected by time

• It provides complete genetic information