A Person Is Heterozygous for a Locus on Chromosome 1

Multiple Choice

A person is heterozygous for a locus on Chromosome 1. The first copy of Chromosome 1 has the sequence 5′-AACTACGA-3′; the second copy has the sequence 5′-AACTTCGA-3′. Which of the following statements correctly describes theses sequences?

A) They contain a SNP that may be useful for genetic mapping.
B) They identify a location where only one copy could be cut by a restriction enzyme.
C) They contain an STR that may be useful for forensic analysis.
D) They may carry out RNA interference.