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Evolution of Species - Coggle Diagram
Evolution of Species
Process of Speciation:
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After a very long period - populations can no longer interbreed to produce fertile offspring, so a new species has formed
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No member of a species is identical to each other - variation occurs as a result of mutations that create new alleles of genes
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If a mutation occurs in a gene that results in a change to the sequence of DNA bases - protein structure might also be altered.
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Mutation can be advantageous, neutral or disadvantageous
Some people carry the mutant gene that codes for haemoglobin. If so the protein for mutant alleles doesn't function and can distort shape of red blood cells
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Individuals produce more offspring than their environment can handle and some die due to environmental selection pressures - disease, food shortage, etc. This is called natural selection
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An adaption is an inherited characteristic that enables an organism to be more well adapted to it's environment
A population of one species can only evolve into more than one species if groups within the population become isolated from each other