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Excerpt from Mutations and Evolution
If we go but a step further, and assume that these variations are followed by others in the same population with elimination of some steps by selection or if we assume the immediate origin of new specific types through single mutations, and their gradual spread from the centre of origin, then we are using the mutation theory of de Vries as it is widely applied at the present time. Darwin's objections to sudden and considerable deviations of structure as material for evolution, were based largely upon his observations of wide saltations and monstrosities. They included the well-known argument of swamping through crossing, which has since been negatived by the Mendelian discoveries.
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Paperback. Zustand: New. Print on Demand. This book challenges the scientific consensus on the fundamental principles of evolution. The author, an acclaimed geneticist, reveals new insights into the role of mutations as a mechanism for evolutionary change. The book presents a groundbreaking theory that sheds light on the origin and behaviour of certain plant and animal species with an extra chromosome, drawing from extensive research conducted with the evening primrose plant, Oenothera. It explores the concept of mutations as spontaneous alterations in the genetic material, leading to new heritable traits. The author's findings on duplicate factor mutations, chromosome duplication, and the impact of these changes on heredity and evolution challenge traditional views. The book offers a comprehensive analysis of mutation phenomena in plants and animals, providing a foundation for future research and a deeper understanding of evolutionary processes. Its insights will resonate with biologists, geneticists, and anyone interested in the mechanisms that shape the diversity of life on Earth. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9781330306109_0
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