Consider the following DNA sequences:

Nucleotide position
                   1       5       10
Person 1 ...GCCTGCCTGA...
Person 2 ...GCCAGCCTTA...
Person 3 ...GCCGGCCTCA...
Person 4 ...GCCCGCCTAA...

What is the nucleotide position of all the SNPs in the given sequences?

• A. Positions 1 and 7
• B. Positions 3 and 6
• C. Positions 5 and 10
• D. Positions 4 and 9

Answer: (D)