Above is a picture of DNA fingerprints of eight members of the Rieser family. Individuals 4, 6, and 8 have a disease similar to Huntington's called Jenkins neuromuscular disorder. The other family members do not have the disease. Which DNA fragment or fragments are responsible for the disease? Remember that the same row means it is the same fragment.

the correct answer would be d. hope this !

12 is it do you think so

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol