[单选题]
A DNA profile was made
g7 b ,asehdkn;syh076 ykcq:h;ll q-3 using DNA from a crime scene. Locus TH01 was used to identify whether a suspect’s DNA matched the crime scene DNA. The suspect’s two alleles of the gene at Locus TH01 are shown below.
qky-q:3lc ;h l
The alleles TH01-6 and TH01-4 were separated and visualised with gel electrophoresis. The resulting gel, with two bands of DNA, is shown below.
What is the DNA in Band B and why is this DNA at this position?