Are we drowning in the gene pool

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Are we drowning in the gene pool?

• Nick Martin
• Queensland Institute of Medical Research

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New statement of old question

• Free will vs. determinism
• Nature vs. Nurture
• Autonomy of the individual

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Jim and Jim, MZ twins reared apart
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Body postures of MZ twins reared apart
Body postures of DZ twins reared apart
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MZ twins reared apart - note the same way of
supporting their cans of beer
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Sources of variation in alcohol dependence
Non-shared environment
Additive genetic
Shared environment
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Sources of variation in male sexual orientation
EC
AC
0.30
0.70
Homosexuality
0.94
0.73
0.88
Number of same-sex partners
Orientation of sexual feelings
Attitude to sex with a man
EP
AP
AF
AA
EA
EF
lt 0.01
0.08
0.04
0.16
0.06
0.11
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DRD2 genotype and heroin addictionA1 allele
frequency

• 95 Brisbane heroin addicts on methadone treatment
  program
• 54 successful treatment outcome
• 22 dropped out
• 19 poor treatment outcome
• Lawford et al (2000) Am J Med Genet 96592-8