[Campbell Biology P.486] Based on the STR marker data in Figure 20.24 b , which individual's... | Practice Question

Based on the STR marker data in Figure 20.24 b , which individual's DNA profile matches the semen sample found on the victim?

  • A: Earl Washington
  • B: Kenneth Tinsley
  • C: Both Earl Washington and Kenneth Tinsley
  • D: Neither Earl Washington nor Kenneth Tinsley

Explanation

The STR marker data in Figure 20.24 b shows that the semen sample on the victim has marker values of 17,19 , 13,16 , and 12,12 for STR marker 1, 2, and 3, respectively. Kenneth Tinsley's STR profile also shows 17,19 , 13,16 , and 12,12 for the same markers. Earl Washington's profile, however, is 16,18 , 14,15 , and 11,12 , which does not match the semen sample. Therefore, Kenneth Tinsley's DNA profile matches the semen sample.