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Forensic Science
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Hisham Ragab

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MATERIAL -Forensic bio & identification of body fluids -forensic DNA -forensic DNAprofiling, CODIS & DNAdatabase -the forensic expert witness testimony -explosives -forensic entomology -3d forensic reconstruction -forensic toxicology, drug screening -impaired driving • Mendel’s particulate hereditary elements are called genes • The various form of a given gene are called alleles • Organisms in which the members of a pair of alleles are different are heterozygous • Those in which the two alleles are alike are homozygous • The genotype is the genetic constitution • The observable properties of an organism constitute is phenotype Direct exam is a hearing to determine the admissibility of evidence, the competency of a witness or juror Ans: F Seminal acid phosphate which is water soluble, may be removed by laundering, but may be detected after dry clean Ans: T (Remark: It dissolves in liquid but not vapor) The basic premise of theAAFS code of Ethics and Conduct is a. to regulate and ensure ethical behavior on the part of its members, with respect to their jobs in the forensic science b. to protect the reputation of theAcademy (AAFS) c. to protect the interests of third party Ans: a & b Proper chronological sequence for DNAtyping in a forensic lab: Extraction  quantitation  amplification  detection  analysis (Remark: quantitation is to determine the amount of DNAfor PCR) General –Acceptance Standard First articulated in an influential Daubert vs. Merrell Dow Pharmaceuticals (1993) Ans: F (Remark: first case = 1923 – frye vs US case) Which is NOT a faculty affected by alcohol consumption? a. Choice reaction time b. Speed and distance judgment c. Vision d. Risk assessment Ans:ALL Biochemist sirAlec Jeffrey invented the PCR, a method to make multiple copies from a small sample of DNA Ans: F (Remark: 1. Kary Mullis (1985) invented PCR, Nobel prize in 1993, 2.Alec Jeffrey invented DNA fingerprinting, first applied to case in 1986, double sexual assault and murder case) Haptoglobin, phosphoglucomutase, group-specific component, and esterase D are examples of a. proteins b. proteins and enzymes c. enzymes d. glycolipids Ans : B Definition of law is: a. the system of rules that a particular country or community recognizes as regulating the actions/governs the behavior of its members b. a set of moral principles: a theory or system of moral values c. the principles governing an individual or a group Ans: a Highly complex instrument used to break apart molecules into ions, provides a distinctive fragment pattern, makes the ‘fingerprint’of each compound, the resulting patterns are then compared to a reference sample for identification purposes a. Infrared spectroscopy (IR) b. Mass spectroscopy (MS) c. Nuclear magnetic resonance spectroscopy (NMR) (not for organic) d. Capillary electrophoresis (CE) (for drugs) e. Thin layer chromatography (TLC) (not for confirmation) Ans :B (GCMS) In Canada, it refers to a ‘trial within a trial’ a. Direct exam b. Cross-exam c. Voir Dire d. The sound-Methdology Standard Ans : Voir Dire STR (short tendon repeat) testing is a test based on the use of PCR Ans: T (Remark: Old technique: DNAfingerprinting, based on the use of restriction enzymes, not PCR) Delta 9 Tetrahydrocannabinol (THC) is a primary psychoactive compound in marijuana Ans: T When a presumptive test for blood is positive, it means blood is present and you don’t have to test further Ans: F (Remark: when negative, MUST not present, positive = MAY BE present (confirmatory test needed)) N
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