Mollecular Biology Flashcards
(31 cards)
What does DNA code for?
Proteins
How many cells are in the human body?
100 Trillion (10^12)
What 3 cell types don’t contain the full human DNA?
Platelets, Oecytes and spermatozoa
Where is DNA found?
Nucleus and mitochondria
How many base pairs are in the human genome?
6.14 billion
What percentage of human DNA is unique?
less than 1%
What are chromosomes?
Tightly packed DNA
What biological material is relevant to a case?
Any
What is a genome?
Genetic information of an organism
What is a gene?
A functional unit of inheritance
What is a locus?
A site within a genome
What is an allele?
Different versions of the same gene or locus
What is a polymorphism?
A change in the order of base pairs
What is a tandem repeat?
A repeated group of base pairs
What is the purpose of PCR?
To allow us to create millions of copies of a small section of DNA allowing for better detection
If a suspect doesn’t plea guilty, what happens?
The forensics expert testifies
What can DNA comparison result in? (3)
Inclusion, exclusion or inconclusive results
Who is included in the elimination samples? (6)
Consensual sex partners, family members, roommates, crime scene technicians, detectives and laboratory personnel
What is the basic unit of life?
The cell
What is DNA’s two purposes?
to make copies of itself and to carry instructions on how to make proteins.
What is the centre of a chromosome called?
A centromere
How often do gloves need to be changed?
Between each piece of evidence
Why do bloodstains need to be dried?
To prevent mould
What are the four requirements of a presumptive test?
Simple, inexpensive, safe and easy
