Reconstructing the history of life a genetic approach

Tamma, Krishnapriya (2016) Reconstructing the history of life a genetic approach. i wonder.... pp. 127-133. ISSN 2582-1636

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Humans have always been curious about the origins of life on earth. Many theories and explanations have been offered over the course of human history. When Darwin and Wallace first presented the theory of evolution by natural selection, it led to a great deal of controversy. However, today there is indisputable evidence for this theory. Evolution, according to Darwin, proceeded through ‘Descent with modification’, which simply denoted the passing of traits from parent to offspring, albeit imperfectly. Offspring, while being largely similar to their parents, may show some differences. Over time, these differences may be selected and result in a divergence strong enough for a new species to be formed. This new species is still related to the older one, since it is derived from it. Just like my cousin and I share a common ancestor in the form of a grandfather, species too share common ancestors with other related species. Going sufficiently far back in time, we can actually trace the ancestor for all life on earth (about 3.8 billion years ago). Therefore, we can reconstruct the history of life on earth by carefully reconstructing relationships between species.

Item Type: Articles in APF Magazines
Authors: Tamma, Krishnapriya
Document Language:
Uncontrolled Keywords: Science, Science education, Science classroom, Biological sciences, Biology, Genetics
Subjects: Social sciences > Education > Science education
Natural Sciences > Life sciences; biology > Genetics & evolution
Divisions: Azim Premji University > University Publications > i Wonder...
Full Text Status: Public
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