Imagine that you compare two DNA sequences found in the same location on homologous chromosomes.On one of the homologs,the sequence is 5'AACTACGA3'.On the other homolog,the sequence is 5'AACTTCGA3'.Within a population,you discover that each of these sequences is common.Which of the following is most likely true about these sequences?
A)They contain an SNP that may be useful for genetic mapping. B)They identify a protein-coding region of a gene. C)They cause disease. D)They are part of a promoter sequence. E)They may be important for differentiation.