Behavioral Genetics
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QUESTION
What is the basic logic of an adoption study for separating genetic and environmental effects?
QUESTION
What is gene-environment correlation (
r
G
E
rGE
r
GE
) in psychopathology?
QUESTION
Using Falconer, what is
c
2
c^2
c
2
if
r
M
Z
=
0.70
r_{MZ}=0.70
r
M
Z
=
0.70
and
r
D
Z
=
0.50
r_{DZ}=0.50
r
D
Z
=
0.50
?
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ANSWER
c
2
=
0.30
c^2 = 0.30
c
2
=
0.30
. Calculation gives
c
2
=
2
(
0.50
)
−
0.70
=
0.30
c^2 = 2(0.50) - 0.70 = 0.30
c
2
=
2
(
0.50
)
−
0.70
=
0.30
, showing 30% of variance from shared environment.
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