Acertain segment of dna can be used as a molecular clock. its rate of mutation is one mutation per 15 million years. examine the dna segments from two different species: species a: gttgagctagtatggacc species b: gataagctagtaaggtca using this example, explain how this information can be used to determine how long ago these two species shared a common ancestor. be sure to answer this question in paragraph form using complete sentences.

Species A: GTTGAGCTAGTATGGACC

Species B: GATAAGCTAGTAAGGTCA

These species differ in 5 nucleotides.

This number should be multiplied by the rate of mutations; that is;

5 × 15 million years =75 million years.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: