Chapter 8 Flashcards
When DNA from 2 sources are combined into one single piece of DNA
Recombinant DNA
Preferred name of the technique used to determine if DNA comes from a particular individual
DNA profiling
If you commit a crime and leave behind DNA this material can be amplified by what and used to identify you
PCR
Genomic libraries can be constructed using plasmids or
Phages
Standard tool used for DNA profiling by forensic scientists
STR analyses
Why is the whole-genome shotgun method currently the tool of choice for analyzing genomes
It’s fast and inexpensive
Cloning to produce embryonic stem cells
Therapeutic cloning
Separation of cells from whole tissue
Cell extraction
Solid, fell-like, fluid surrounding cells and assist in tissue function and cellular interaction
Extracellular matrix
Separates cells according to fluorescence antibody tag
Fluorescence - activated cell sorter
Undifferentiated s has ability to create different cells
Embryonic stem cells
Evidence that most differentiated cells retain a full set of genes
Plant cloning and animal limb regeneration
Replacing the nucleus of an egg cell or zygote with a nucleus from an adult somatic cell
Nuclear transplantation
Implant embryo in surrogate mother, new animal is genetically identical
Reproductive cloning
Group of cells
Blastoa
Can give rise to many but not an types of cells
Adult stem cells
Remove haploid nucleus from unfertilized egg, insert diploid nucleus
Somatic cell transplantation
Produced by asexual reproduction and genetically identical to parent
Clone
Ability to manipulate DNA with precision in a test tube
Genetic engineering
Cut the DNA double helix at specific sites into fragments
Restriction nucleases
Hpal
Blunt ends
EcoRI, HindIII, PstI
Staggered ends
Can form complementary base pairs with the tail at any other end produced by same enzyme
Cohesive ends
Method of staining DNA that fluoresces under UV light
Ethidium bromide
How can the double helix rapidly dissociate
Heated at 100C or exposed to ph ≥ 13
Process of disturbing base pairs and dissociating double helix
DNA denaturation
Process of DNA reforming double helices at 65C
Hybridization
DNA circles are cut with
Restriction nuclease
Cuts DNA at specific sequences, may leave sticky ends
Restriction enzymes
A collection of all the cloned DNA fragment from a target genome
Genomic library
Genomic library vectors
Plasmid, phage, bacterial artificial chromosome
Extracting the mRNA and making a DNA copy
cDNA
cDNA reaction is catalyzed by
Reverse transcriptase enzyme
cDNA clone and entire connection derived from one mRNA
cDNA library
Single - stranded cDNA converted to double stranded cDNA by
DNA polymerase
Most important advantage of cDNA clones
Contain uninterrupted coding sequence of a gene
To deduce amino acid sequence of protein or produce protea in bulk it’s preferable to start with
cDNA
Rapid cloning of genes allows DNA to be amplified
Polymerase chain reaction (PCR)
PCR relies on a pair of
Primers
Repeated cycle of steps for PCR
- sample is heated to separate strands
- sample is cooled and primer binds to target sequence
- target sequence is copied with heat-stable DNA polymerase
Separates DNA molecules based on size
Gel electrophoresis
Gel electrophoresis current moves
Negative electrode to positive
More through gel pores quickly and farther
Shorter DNA fragments
Genetic markers used in DNA profiling
Short tandem repeats
Standard for DNA profiling analyzes how many STR sites
13
Uses of DNA profiling
- Forensics
- paternity tests
- identification of human remains
- species identification
Shows colored peaks representing nucleotides
Automated DNA sequencing