Week Seven - ← Heritablity • Phenotype = Environmental...

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Week Seven (Feb 28) 28/02/2008 11:32:00 February 28, 2008 Other Monogenic Traits Chin dimple (cleft) = Dominant Tongue Rolling = Dominant Free Ear Lobe = Dominant Hitchhiker’s thumb = Dominant Cerumen (Ear Wax) = wet is recessive o Dry African and European o Wet Asian Polygenetic/Multi-Factorial Traits Twins Skin Color o The additional effect of three genes each with two alleles +  environmental factors
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Unformatted text preview: ← Heritablity • Phenotype = Environmental + Genetic ← Correlation • Perfect positive = +1 • Perfect Negative = -1 • No correlation = 0 ← Why Complex Traits?? • The value of Plasticity o Secular Trends- trends over time in biological trends… not genetic…. o Stature—populations get smaller in times of famine o Puberty 28/02/2008 11:32:00 ← 28/02/2008 11:32:00 ←...
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