Week 4 Activity_ Attempt review - University of Illinois, Urbana Champaign ANTH 246

4/20/2020 Week 4 Activity: Attempt review




Dashboard / My courses / ANTH 246 OL2 SP20 / Week 4 / Week 4 Activity




Started on Wednesday, April 15, 2020, 3:49 AM
State Finished
Completed on Wednesday, April 15, 2020, 4:01 AM
Time taken 11 mins 50 secs
Points 25.00/25.00
Grade 30.00 out of 30.00 (100%)

Information
Did you complete the Practice for Week 4 Activity first? The practice is not graded and
do the calculations!

For this Activity you get 2 attempts. It is extremely
do not hit the back arrow icon on your browser to t
question/look at old answers, as it will count this a
attempt!!!

As you go through the questions, keep a record of your answers in a separate docum
you start your second attempt at the Activity, you can know what you answered before



Part 1: Calculating Genotype Frequencies a
Do the calculations and answer the questions on the following slides.

You may find it helpful to record your answers to each question as they may be useful f




Question 1 Here is an example using 3 CODIS STR results. DNA evidence was found at a crime scen
Correct DNA sample, only 3 of the 13 CODIS STRs could be determined. The table below lists th
1.00 points out STRs in the second and third columns (Allele A and Allele B).
of 1.00
STR Locus Allele A Allele B P(Allele A) P(Allele B)
D3S1358 11 12 0.5 0.2
TH01 4 4 0.5 0.5
D21S11 7 10 0.1 0.5


Which STR is homozygous for the DNA evidence? Recall that homozygosity means that
2 identical alleles.

, 4/20/2020 Week 4 Activity: Attempt review


Question 2

Correct
STR LocusAllele A Allele B P(Allele A)P(Allele B)
1.00 points out
D3S1358 11 12 0.5 0.2
of 1.00
TH01 4 4 0.5 0.5
D21S11 7 10 0.1 0.5
In this table, the probabilities for the DNA evidence's alleles have already been establis
frequencies in the CODIS database and are presented in the 2 far right columns.
Based on the probabilities (i.e. frequencies) for the various alleles for all 3 STRs, which a
population?


Select one:
a. Allele 7 in D21S11 

b. Allele 4 at TH01

c. Allele 10 at D21S11

d. Allele 11 at D3S1358

e. Allele 12 at D3S1358



Your answer is correct.

The correct answer is: Allele 7 in D21S11




Question 3

Correct
STR LocusAllele A Allele B P(Allele A)P(Allele B)
1.00 points out
D3S1358 11 12 0.5 0.2
of 1.00
TH01 4 4 0.5 0.5
D21S11 7 10 0.1 0.5


And the most common allele(s)?


Select one:
a. Allele 11 at D3S1358, Allele 4 at TH01, and Allele 10 at D21S11 

b. Allele 4 at TH01

c. Allele 11 at D3S1358

d. Allele 7 at D21S11

e. Allele 12 at D3S1358



Your answer is correct.

The correct answer is: Allele 11 at D3S1358, Allele 4 at TH01, and Allele 10 at D21S11