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Although it may be extremely reasonable (especially from our present vantage point) to conclude that some part of human evolution, if not aspects of … - Jeffrey H. Schwartz
" "Although it may be extremely reasonable (especially from our present vantage point) to conclude that some part of human evolution, if not aspects of the diversification of hominoids in general, is indeed preserved in the fossil record of Africa, this does not in and of itself lead inexorably to the conclusion that humans and African apes are closely related.
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About Jeffrey H. Schwartz
Jeffrey Hugh Schwartz (born March 6, 1948) is an American physical anthropologist and professor of biological anthropology at the University of Pittsburgh in Pittsburgh, Pennsylvania, and a fellow and President of the World Academy of Art and Science (WAAS) from 2008 to 2012. Schwartz' research involves the methods, theories, and philosophies in evolutionary biology, including the origins and diversification of primates. He has studied and analyzed human and primate skeletons and archaeological remains, focusing much of his research on dentofacial morphology. He has done substantial fieldwork and museum research in the collections of major museums around the globe.
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Jeffrey Hugh Schwartz
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Additional quotes by Jeffrey H. Schwartz
As was demonstrated as long ago as the 1930s by the German experimental geneticist Hans Grüneberg, neither structural reduction or loss, nor structural addition, is a completely gradual process. Instead, the loss or gain of a structure is developmentally constrained to be more step-wise, or saltational.
The upper and lower ends of a humerus are like the brim and base of an urn. The shaft of the bone is like the belly of the urn. Fragments, even minute ones, of the detailed parts of a bone are like the indicator sherds of a broken urn. Fragments, even large ones, of the shaft of a bone are like the body sherds of a broken urn. Analyzing bones, after all, is very much like analyzing pottery.
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A micromutation can produce what Goldschmidt would have described as macromutation leading to macroevolution. Since mutations in homeobox genes are inherited in the same way that earlier fruit-fly population geneticists understood the inheritance of the alleles for wing length or bristle number, we can appreciate that evolutionarily significant novelty—which, in turn, could result in the emergence of a new species—can be passed on from parent to child as easily and simply as eye color.
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