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Inside this Book – You know them. you’ve seen them, perhaps in the zoo, perhaps in the movies or on television. You’ve looked deep into their dark, soulful eyes, pondered their hairy faces, and recognized a mind behind those eyes. A mind like a child’s perhaps, but a mind akin to your own. You’ve seen their sinewy arms, their long fingers clasping some- thing—a twig to use as a tool? Or perhaps a Raggedy-Ann doll? And you know about those resemblances. That chimpanzee, says the narrator, is more than 98% genetically identical to us. That similarity, he says, blurs the line between us. We are chimpanzees, and they are us. But take another look. Those deep eyes—without whites, which those chimpanzee eyes really do lack—they look more like a dog’s dark eyes than like your own, don’t they? And those sinewy arms are rather hairy, aren’t they? They aren’t human arms at all—they are like human arms. The chimpanzees themselves could not really be con- fused with people. Their heads are smaller. Their eyeteeth are bigger. They have neither noses nor foreheads to speak of. Their legs are short, their ears are huge, and they use their hands in walking. They have thumbs on their feet. They have knees pointing ridiculously far outward.
Inside this book –What It Means to Be 98 Chimpanzee PDF Book by Jonathan Marks – Where does a number like 99.44%, ostensibly representing our basic similarity to another species, come from? Three sorts of data have produced these tabulations. The first is a comparison of protein structure from 1975, by Berkeley geneticists Mary-Claire King and Allan Wilson. Proteins are long strands of elementary subunits,which reflect gene structure and can be compared .Examining the differences between forty-four known proteins of human and chimpanzee, King and Wilson found they were 99.3% identical. (Amazingly,only 0.14% away from the legendary purity of Ivory Soap!) We know that about only 1% of the total DNA of a cell is actually expressed as proteins, and that protein-coding regions are the most slowly changing parts of the DNA. The reason is that mutations or changes to functional DNA are more likely to do systemic damage to the organism than mutations to nonfunctional DNA. Consequently, they are most unlikely to be perpetuated in the species, be- cause their bearers fail to thrive and reproduce as efficiently as the other creatures who lack the damaging mutation. Mutations to non- functional DNA occur at the same rate, but because they are not expressed, they can do their bearers no harm. You would expect that DNA to differ more widely across species.
What It Means to Be 98 Chimpanzee by Jonathan Marks PDF : eBook Information
- Full Book Name – What It Means to Be 98 Chimpanzee
- Author of this Book – Jonathan Marks
- Language – English
- Book Genre – Science
- Download Format – PDF
- Size – 1 MB
- eBook Pages – 328
- Price – Free