ANTHR 101 Chapter Notes - Chapter 4: Gregor Mendel, Blending Inheritance, Phenotype
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This can"t be true because over time, there would be no variation. Blending inheritance: parental contribution is averaged out, or blended in offspring. With each passing generation the advantageous feature is blended out . Undertook a systematic investigation of inheritance using very large numbers of pea plants. It shows variation in a number of different ways. Axial (throughout the flower) or terminal (tips) flowers. F1 generation: all progeny had round seeds, despite variation among parents. When they self-fertilize, some of the seeds come out wrinkly. This shows that the blending theory of inheritance is incorrect. Mendel"s conclusion: particulate inheritance each hereditary characteristic is controlled by particular unit factors, which exist in pairs in individual organisms, one factor is inherited from each plant. These factors remain discrete regardless of external appearance. Wrinkled seeks in f2: there are dominant & recessive traits. Phenotype: the observable or physical expression (ie. appearance) of a trait.
