FRNSC 421W - EXAM 2 PRACTICE QUESTIONS AND ANSWERS (100% VERIFIED AND UPDATED)
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Module
FRNSC421W /FRNSC 420
Institution
FRNSC421W /FRNSC 420
FRNSC 421W - EXAM 2 PRACTICE
QUESTIONS AND ANSWERS (100%
VERIFIED AND UPDATED)
DNA mixtures - Answer️️ -mixed biological fluids/cells of any type
- saliva & skin cells
- blood & semen
- urine from two sources
- sexual assault cases often contain female epithelial/white blood cells & male...
- hyaluronic acid is a "goo" acting as a lubricant in many cell types, allows for
increased access to unfertilized egg cell
acrosin - Answer✔️✔️-digestive enzyme in AAS, assists with the breakdown of
proteins in the unfertilized cell membrane
acrosome reaction - Answer✔️✔️-during fertilization, a sperm fuses with the plasma
membrane and penetrates the female egg cell to fertilize it
- membrane surrounding the acrosome fuses with the plasma membrane of the
sperm's head
- with no AAS, the nuclear membrane and DNA in nucleus is exposed and
hyaluronidase + acrosin is released
- this allows the egg to be fertilized; the egg surface conditions are changed,
blocking other sperm from entering
- spermicidal foams/jellies block reaction w/o destroying DNA; condoms act as a
barrier entirely
- mtDNA produces ATP, used by tail as energy to move
sexual assault statistics - Answer✔️✔️-- approx. 1 in 6 women will become victims
- the majority of perpetrators are white males
- >100,000 cases per year in US, only ~2000 cases result in convictions (~1 in 10)
- conviction allows for low recidivism; if you catch a suspect early, will reduce #
of victims
types of SA evidence - Answer✔️✔️-- swabs: generally have multiple sources of
DNA (oral, vaginal, anal, etc.)
- slides: confirm presence of sperm
2
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