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Early theories of inheritance

Early theories of inheritance - Genesis Hegel Goethe and...

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Early theories of inheritance Greek theories (c. 400 B.C.) environment directs variation Aristotle noted malformed parents produced normal infants o this notion challenged the inheritance of acquired characteristics , where traits aquired during one’s lifetime become incorporated into one’s hereditary information and are passed on to offspring o believed that both males and females made contribution to the offspring and that there was a struggle of sorts between male and female contributions Medieval Germanic literature child influenced by the mother and uncle Preformation sperm had the preformed person already developed inside inside the egg or sperm exists tiny miniature adult, a homunculus problem posed was that all traits would have to have been inherited from only one parent Carolus Linneaus (1707-1778) father of modern taxonomy creationism: fixity of species o belief in the biblical account of the creation of the world described in
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Unformatted text preview: Genesis. Hegel, Goethe and Henschel (19 th century) everything is interrelated by each other Pangenesis (c. 520 B.C.) specific particles called gemmules carry information from various parts of the body to the repoductive organs, from where they are passed to the embryo at the moment of conception concept persisted well into the late 1800s Early plant and animal breeders Klreuter (1760) hybrid vigor in tobacco crossing red and white carnations results in pink flowers ( blending inheritance ) Knight, Seton and Goss (1820) crossed green and yellow peas when self-pollinated the results were both green and yellow peas Grtner (1840) recognized two patterns of hereditary: either offspring were identical to one of the parents or they were intermediate...
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