Exam 3

Question 1

Why is a Y chromosome STR profile more useful compared to an autosomal STR profile for establishing a genetic relationship separated by many generations?

Answer 1

Because it is inherited as a single allele, i.e, non-recombining and unchanged other than a rare mutation.

Question 2

Y STR profiling may be needed to identify a sexual assailant if a differential extraction is not useful because the perpetrator is an________ male.

Answer 2

Aspermic