Evolution is the continual change of heritable characteristics of a biological being over generations. It is said that the root of our evolutionary thinking goes back to Charles Darwin. He is known for being the first person to publish his theory of what is called Darwinism today, which is the theory of evolution of species by a mechanism called natural selection. Simply put, natural selection can be called ‘decent with modification’. Neo-Darwinism is the ‘modern syntheses’ of Darwinism with the inclusion of genetics, as Darwin did not know anything about genes.
During this seminar we will be taking a look evolutionary change through small scale change (microevolution) and its basic mechanisms, as well as large scale change (macroevolution) while also looking at the fossil records.
Microevolution is the evolution and change – within a single population (that share a common gene
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Natural selection acts to preserve and accumulate minor advantageous genetic mutations. Natural selection is the naturalistic equivalent to domestic breeding.
Natural selection guides the evolutionary process, preserving and adding up the beneficial mutations and rejecting the bad ones. EXAMPLE: MOTHS… How are they selected? The individuals that are lacking the favoutrable traits, in other words the unfit’’, will most likely not live longe enough to pass down the unfavourable traits and eventually those traits will be bred out of the population. Th e unfavourable traits may take many generations to decline in numbers and even longer to disappear completely form the gene pool.
Natural selection is one of the best substantiated theories in the history of science, supported by evidence from a wide variety of scientific disciplines, including palaeontology, geology, genetics, and development