Which system is useful for determining the number of male perpetrators in rape cases?
Question and options
Which system is useful for determining the number of male perpetrators in rape cases?
- X-STR
- Y-STR
- VNTR
- SNRR
Answer and explanation
Correct answer: B - Y-STR
Y-STRs are on the male-specific Y chromosome, so in mixed rape samples they reveal only male profiles and the number of distinct haplotypes indicates the number of male contributors. X-STRs and VNTRs are present in females too, so the victim's DNA would mask the male contributors.
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