The hypothesis asserts that African-Americans are more prone to diseases such as pyelonephritis and syphilis that may result in secondary hypertension.

Associated disorder

Explanation:

Associated disorder hypothesis proposes that the high-frequency hypertension of African-Americans is caused by other diseases such as pyelonephritis and syphilis. There are other hypotheses that can explain the cause too. The genetic hypothesis said that it because the gene of African-Americans is different. The psychological stress hypothesis thinks that discrimination causes stress which leads to higher blood pressure.  

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: