IB Biology Topic D1.1.5 Applications of Polymerase Chain Reaction and Gel Electrophoresis Revision Notes (SL/HL)

IB Biology Topic D1.1.5 Applications of Polymerase Chain Reaction and Gel Electrophoresis Revision Notes (SL/HL) | RevisionDojo

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DNA Profiling Reveals Unique Patterns

Definition

DNA profiling

DNA profiling is a technique used to identify individuals based on unique patterns in their DNA.

DNA profiling is a cornerstone of forensic science, used to match DNA from a crime scene to a suspect.
Even a tiny sample, such as a drop of blood or a strand of hair, can be amplified and analyzed to identify a suspect or clear an innocent person.
It relies on regions called short tandem repeats (STRs), short DNA sequences that repeat many times.
The number of repeats varies a lot between people, so STRs are ideal for telling individuals apart.

How DNA Profiling Works

Sample collection
1. DNA is taken from a source like blood, saliva, or hair.
Amplification with PCR

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Duis aute irure dolor in reprehenderit

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Note

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Tip

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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DNA Profiling Reveals Unique Patterns

Definition

DNA profiling

DNA profiling is a technique used to identify individuals based on unique patterns in their DNA.

DNA profiling is a cornerstone of forensic science, used to match DNA from a crime scene to a suspect.
Even a tiny sample, such as a drop of blood or a strand of hair, can be amplified and analyzed to identify a suspect or clear an innocent person.
It relies on regions called short tandem repeats (STRs), short DNA sequences that repeat many times.
The number of repeats varies a lot between people, so STRs are ideal for telling individuals apart.

How DNA Profiling Works

Sample collection
1. DNA is taken from a source like blood, saliva, or hair.
Amplification with PCR

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D1.1.5: Applications of Polymerase Chain Reaction and Gel Electrophoresis Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

DNA Profiling Reveals Unique Patterns

How DNA Profiling Works

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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DNA Profiling Reveals Unique Patterns

How DNA Profiling Works

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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