Explaining inheritance: Mendel and beyond
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I can describe the role of Gregor Mendel and other scientists in the development of our understanding of inheritance and genetics.
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Mendel investigated the inheritance of traits (e.g. flower colour and seed texture) in pea plants in the 1850s-60s.
Earlier scientists thought traits blended during sexual reproduction; Mendel showed traits were dominant and recessive.
Mendel suggested heritable ‘factors’ caused traits; other scientists discovered DNA in 1869 and genes in the 1900s.
Theories about heredity developed over time; 1943: DNA associated with inheritance; 1953: structure of DNA worked out.
Over recent decades scientists have discovered the importance of studying whole genomes, not just individual genes.
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