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ARE WE
EVOLVING A new study by evolutionary biologist Robert Dorit (Yale), Hiroshi Akashi (University of Chicago), and Walter Gilbert (Harvard) did not produce the results they had hoped for. In an attempt to trace the background of humans, these researchers looked for genetic differences in the Y chromosome of 38 men living in different parts of the world and having different ethnic backgrounds. Since only males posses the Y chromosome, this study offered a narrowly focused look at genetic material as it developed over time and difference. A parallel study was done a few years earlier on women's genetic variation, because the variations differences were so slight, the researchers concluded that women can only trace their background only a couple of hundred thousand years to a common ancestor the Scientists called "Eve",(*note, 200,000 years may be a much larger estimate then it actually is. according to the original author.). This earlier study offered a shred of support for microevolution, (The change over short periods of time.). To the surprise of the researchers, Dorit and his associates found no differences at all in the Y chromosome of the 38 men, (no nucleotide differences at all in the non recombinant parts of the Y chromosome). This non-variation suggests no evolution has occurred in male ancestry. Based on this analysis the researchers concluded that men's forefather-a single individual, not a group, lived no more than 270,00 years ago, (again they original author feels this estimate is larger then it actually is). This newest research rules out microevolution. Both studies rule out macroevolution, (changes over long periods of time). Homo erectus, (a human like species which existed 0.5 to 1.5 million years ago) could not be the progenitor of modern man, due to the time discrepancy. When we compare the Y chromosome of modern humans to the modern apes, chimpanzees, and orangutans, we find a large species-to-species genetic variation, but within each species vary little if any variation is found. The researchers hope new studies will show greater variation within a species and less variation among different species. Hugh Ross states that three of his colleagues
(biologists) at Caltec University confirmed that between 25%
- 50% of the biologists they know, now studying evolution
are Christians. References from Hugh Ross: - Robert L. Dorit, Hiroshi Akashi, and Walter Gilbert, "Absence of Polymorphism at the ZFY Locus on Human Y Chromosome," Science, 268 (1995), pp.1183-1185. - Svante Paabo, "The Y Chromosome and the Origin of All of Us (Men), " Science, 268 (1995), pp.1141-1142. - Hugh Ross, "The Mother of Mankind" Facts & Faith, vol. 2, no. 1 (1988), pp. 1-2. - Hugh Ross,"New Twists in Theories of Human Evolution," Facts & Faith, vol. 8, no. 2 (1994), pp. 4-5. |
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