What is the Probability That Two,independent,10bp DNA Sequences,are Identical by Chance

Question

What is the probability that two,independent,10bp DNA sequences,are identical by chance? A) -10⁴ B) (0.25)¹⁰ C) 10⁴ D) 0.25 × 10⁴ E) 10^-4

Accepted Answer

The probability that two independent 10bp DNA sequences are identical by chance is (0.25)^10, since each base pair (A, T, C, or G) has a 1/4 chance of being selected at each position, and there are 10 positions to match exactly.