Summary Practice questions for Behavior genetics in psychology (with explanations)

Practice exam for Behavior
genetics in psychology with
answers
1. The process of copying a DNA sequence into an RNA sequence is ________ called.
a. Replication
b. Transcription
c. Translation
d. PCR

The right answer is B.
- Replication  Copying the DNA into a new strand of DNA.
- Translation  Translating the mRNA molecule into a protein.
- PCR  Method to amplify a particular DNA sequence for research.

2. How large is the influence of unique environmental factors on gene expression if the DZ correlation
is .22 and the MZ correlation .40?
a. .30
b. .68
c. .48
d. .60

The right answer is D.
- E = 1 - rmz = 1 – 0.40 = 0.60
- Or you could also say:
o A = 2(rmz - rdz) = 2(0.40 – 0.22) = 0.36
o C = 2rdz – rmz = 2*0.22 – 0.40 = 0.04
o E = 1 – A – C = 1 – 0.36 – 0.04 = 0.60

3. The image below shows the results of




a. A linkage study and no linkages were found.
b. A next generation sequencing study and several hits were found.
c. A genome wide association study and several hits were found.
d. A genome wide association study and no hits were found.