An individual is charged with murder, based on DNA typing of a blood sample that is more than 20 years old. The accused claims that the evidence is no longer relevant because: (Select all that are legitimate arguments, even if unlikely.)
A)20-year-old DNA cannot be typed reliably because it becomes chemically degraded.
B)his DNA has changed because of somatic mutation.
C)the chance of mislabeling an evidence sample from so long ago is too great.
D)a sample that old could no longer discern the accused from his brother.
E)None of the other answer options is correct.

Question

Quizplus · Accepted Answer

DNA can degrade over time, increasing the chance of unreliable results. Mislabeling is a legitimate concern with old evidence. DNA from siblings can be difficult to distinguish, especially with degraded samples.

An Individual Is Charged with Murder, Based on DNA Typing