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Genetics is the branch of biology which deals with heredity and variation in living organisms. The modern science of genetics started with the work of Gregor Mendel in the mid-nineteenth century. He found that organisms inherit traits in a discrete way and the basic units of inheritance are now called genes.
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Washington Post - Everything you need to know about Congress's online piracy bills, in one post
http://www.washingtonpost.com/blogs/ezra-klein/post/everything-you-need-to-know-about-congresss-online-piracy-bills-in-one-post/2011/12/16/gIQAz4ggyO_blog.html