DNA Profiling and Sequencing (Leaving Cert Biology): Flashcards

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DNA Profiling and Sequencing
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Alternative name for DNA profiling

DNA fingerprinting

Exception to unique DNA profiles

Identical twins

PCR acronym meaning

Polymerase Chain Reaction

PCR purpose in DNA profiling

Amplifies DNA to make millions of copies for analysis

PCR cycles & copies produced

~30 cycles → ~1 billion copies

Taq polymerase function in PCR

Builds new DNA strands

Restriction enzymes function

Cut DNA at specific sequence patterns into fragments

Gel electrophoresis separates DNA by

Size (smaller fragments move faster & further)

DNA charge in gel electrophoresis

Negative (moves to positive electrode)

DNA sequencing determines

Exact order of nucleotides (A, T, G, C)

Sanger sequencing inventor

Fred Sanger (won Nobel Prize twice)

Next-generation sequencing advantages

Faster, more accurate, cheaper than traditional methods

Original Human Genome Project time & cost

13 years, ~£2.5 billion

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