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I posed a similar question a while back. You might want to check it out, even if the answer is inconclusive... –  single_digit May 6 '13 at 13:12
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Not accurately. Assuming the DNA information is the DNA sequence, you can't tell which genes are being expressed and which are being silenced. These are through chemical groups on the DNA which aren't generally picked up.

Also there's the environment that grossly affects what you look like, how much you weigh, your skin colour and cosmetic surgery.

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Just for added clarity, the chemical modifications I referred to were epigenetic mechanisms of methylation and histone acetylation etc. –  AndroidPenguin May 10 '13 at 23:30
    
Just saying grossly means net-gain. It's used when describing things like financial matters, and really doesn't make sense here..unless you mean they've had some sort of terrible accident :P –  Starkers Mar 15 at 12:43
    
@Starkers in medical terms it means that which is visible to the naked eye. It also is used for financial matters. It's a homonym. –  AndroidPenguin Mar 15 at 13:45
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