Meiosis
DNA Degradation
OOPS
The Lost Arts
Enzymes Enzymes Enzymes
200

This stage of Meiosis I is the period of growth that allows distribution of genetic material

What is Interphase I?

200

If only DNA had sunscreen to protect from this degradation source

What is UV Radiation?

200

This profile artifact is typically caused by too much DNA input

What is Pull-up?

200

This DNA extraction reagent is comprised of toxic and carcinogenic chemicals. No wonder it is no longer used at most forensic labs anymore!

What is Phenol-Chloroform?

200

This forensically relevant enzyme helps to break down carbohydrates and starches

What is Amylase?

400

This stage of Meiosis II ends with 4 haploid daughter cells created

What is Telophase II/Cytokinesis II?

400

Humic acid is a component of this material known to degrade DNA

What is Soil?

400

This phenomenon during DNA replication is frequently associated with causing stutter peaks during capillary electrophoresis

What is Strand Slippage?

400

This medical test was once used as a forensic identification method despite its minimally discriminatory nature

What is ABO Typing?

400

This enzyme is coveted in forensic circles for its thermal resistance at high temperatures

What is Taq Polymerase?

600
During this stage of Meiosis I, chromatids align in the middle of the cell

What is Metaphase I?

600

This common household cleaner is an effective degradation agent for DNA. Just don't mix it with ammonia!

What is Bleach?

600

This profile artifact is caused by reflective material within the POP-4 polymer or any substance that comes across the CCD camera

What is a Spike?

600

This method for genetic sequencing utilizes VNTR's and restriction sites

What is Restriction Fragment Length Polymorphism (RFLP)?

600

This enzyme is responsible for connecting Okazaki Fragments to create one continuous strand

What is Ligase?

800

In this stage of Meiosis I, chromosomes are pulled towards opposite poles

What is Anaphase I?

800

These two degradation agents prove that not even DNA can survive Florida!

What are Humidity and Heat?

800

Tri-allelic peak patterns are abnormal and could be caused by this "mythical" medical phenomenon

What is Genetic Chimerism?

800

This forensic DNA typing method utilizes a polymorphic gene found in the leukocyte antigen system 

What is HLA-DQa analysis?

800

This enzyme breaks down RNA primers towards the end of the DNA replication process. However, it can also degrade DNA if left to its own devices!

What is Nuclease?

1000

In this stage of Meiosis II, spindles form and nuclei disintegrate in preparation for cell division

What is Prophase II?

1000

DNA is fragile, particularly after amplification. Be careful as this major step in reagent preparation can actually degrade DNA!

What is Vortexing?

1000

Allelic dropout is frequently associated with degradation and this lesser considered factor. Think DNA replication!

What is a Primer Binding Site Mutation?

1000

This traditional DNA quantification procedure utilizes the southern blotting method

What is Slot Blot?

1000

This enzyme helps to stabilize the structure of DNA as it gets unwound and lysed by helicase

What is Topoisomerase?