DNA Evidence

Why type of evidence is DNA?

• Class

• Trace

• Individual

• Direct

Tags

NGSS.HS-LS3-1

Which male is the father of this child?

• Male 1

• Male 2

• Neither could be the father

• Either could be the father

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Who can be included as source of paternal DNA for this child?

• male #1

• male #2

• neither male

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

DNA fingerprinting works because

• Most genes are dominant

• All organisms contain RNA

• The most important genes are different among most people

• No two people, except identical twins, have exactly the same DNA 

DNA can be used for ...

• determining paternity

• identifying human remains

• identifying a suspect

• All of these

Tags

SFS3

Which part(s) of a hair can be analyzed for DNA?

• root

• cuticle

• medulla

• cortex

What is the purpose of gel electrophoresis in DNA analysis?

• To separate DNA based on size

• To visualize DNA fragments

• To create a DNA profile

• To compare DNA sequences

Why are restriction enzymes used when making a DNA fingerprint using STRs?

• They are used to determine the size and shape of DNA fragments.

• They are used in order to allow us to determine if a specific family or family member is related to the crime based on their DNA fragments.

• STR bands are units of bases that are typically two to five bases long and repeat multiple times. Restriction enzymes cut these bands since they match the enzyme, making them easily recognisable.

Data points are used to determine which base pairs match within the gel. If the pairs match, there is a high likelihood that both strands belong to the same individual.

• Analyze DNA

• Gel Electrophoresis

• Use Restriction Enzymes

Why are restriction enzymes used when making a DNA fingerprint using STRs?

• They are used to determine the size and shape of DNA fragments.

• They are used in order to allow us to determine if a specific family or family member is related to the crime based on their DNA fragments.

• STR bands are units of bases that are typically two to five bases long and repeat multiple times. Restriction enzymes cut these bands since they match the enzyme, making them easily recognisable.