Human Cloning can have drastic effects Give your views for or against the topic in 350 words.
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There are, in mankind, two kinds of heredity: biological and cultural. Cultural inheritance makes possible for humans what no other organism can accomplish: the cumulative transmission of experience from generation to generation. In turn, cultural inheritance leads to cultural evolution, the prevailing mode of human adaptation. For the last few millennia, humans have been adapting the environments to their genes more often than their genes to the environments. Nevertheless, natural selection persists in modern humans, both as differential mortality and as differential fertility, although its intensity may decrease in the future. More than 2,000 human diseases and abnormalities have a genetic causation. Health care and the increasing feasibility of genetic therapy will, although slowly, augment the future incidence of hereditary ailments. Germ-line gene therapy could halt this increase, but at present, it is not technically feasible. The proposal to enhance the human genetic endowment by genetic cloning of eminent individuals is not warranted. Genomes can be cloned; individuals cannot. In the future, therapeutic cloning will bring enhanced possibilities for organ transplantation, nerve cells and tissue healing, and other health benefits.
The hominin lineage diverged from the chimpanzee lineage 6–7 Ma, and it evolved exclusively in the African continent until the emergence of Homo erectus, somewhat before 1.8 Ma. Shortly after its emergence in tropical or subtropical Africa, H. erectus spread to other continents. Fossil remains of H. erectus (sensu lato) are known from Africa, Indonesia (Java), China, the Middle East, and Europe. H. erectus fossils from Java have been dated at 1.81 ± 0.04 and 1.66 ± 0.04 Ma and from Georgia at 1.6–1.8 Ma (1). Anatomically distinctive H. erectus fossils have been found in Spain, deposited before 780,000 y ago, the oldest in southern Europe (2).
The transition from H. erectus to H. sapiens occurred around 400,000 y ago, although this date is not well determined owing to uncertainty as to whether some fossils are erectus or archaic forms of sapiens. H. erectus persisted for some time in Asia, until 250,000 y ago in China and perhaps until 100,000 ago in Java, and thus was contemporary with early members of its descendant species, H. sapiens. Fossil remains of Neandertal hominids (Homo neanderthalensis), with brains as large as those of H. sapiens, appeared in Europe earlier than 200,000 y ago and persisted until 30,000 or 40,000 y ago (3, 4).
There is controversy about the origin of modern humans. Some anthropologists argue that the transition from H. erectus to archaic H. sapiens and later to anatomically modern humans occurred consonantly in various parts of the Old World. Proponents of this “multiregional model” emphasize fossil evidence showing regional continuity in the transition from H. erectus to archaic and then modern H. sapiens. Most anthropologists argue instead that modern humans first arose in Africa somewhat before 100,000 y ago and from there spread throughout the world, eventually replacing elsewhere the preexisting populations of H. erectus, H. neanderthalensis, and archaic H. sapiens. The African origin of modern humans is supported by a wealth of recent genetic evidence and is therefore favored by many evolutionists.
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