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1) A 12 year old boy complains of achy joints usually after soccer practice

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1) A 12 year old boy complains of achy joints usually after soccer practice. He complains of pain upon waking in the morning although pain lessens as he is more active during the day. He has been diagnosed with juvenile arthritis. What is the role of genes in the development of arthritis? 

2) Compare and contrast osteoarthritis and rheumatoid arthritis.