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Obesity lecture

Obesity lecture - Overweight is constant since 1962 Obese...

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Overweight is constant since 1962 Obese has increased No statistic significance change since 2003-2004 "epidemic of obesity" is progressed through companies making money In an environment where everyone has unlimited access to calories, why is weight so variable? How do we assess genetic contributiors to human traits? Twin Studies Monozygote—share environment and genes Dizygote Overfeeding responses of identical twins o 12 pairs monozygotic male twins design: over fed 1000kcal day 84 days weight gain: mean = 17.8lb range: 9.5lb to 29.3lb nodifference within pairs of twins in: body weight, %fat, fat mass, regional fat distribution Conclusion: big differences between pairs, but no aidfferences within pairs Why is there a big variability? Why is there a no variability between the twins? Genetic contribution Adoption Studies o Adopted children resemble biological, not adoptive, family Heritability estimates o Height .9 o Schizophrenia .68 o
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Obesity lecture - Overweight is constant since 1962 Obese...

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