Blending inheritance | Wikipedia audio article
Channel: wikipedia tts
Date: 10/05/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Blending_inheritance


00:01:06 1 History
00:01:16 1.1 Darwin's pangenesis
00:06:40 1.2 Replacement by Mendelian inheritance
00:08:03 2 See also



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SUMMARY
=======
Blending inheritance is an obsolete theory in biology from the 19th century. The theory is that the progeny inherits any characteristic as the average of the parents' values of that characteristic. As an example of this a crossing of a red flower variety with a white variety of the same species would yield pink-flowered offspring.
Charles Darwin's theory of inheritance by pangenesis, with contributions to egg or sperm from every part of the body, implied blending inheritance. His reliance on this mechanism led Fleeming Jenkin to attack natural selection on the grounds that blending inheritance would average out any novel beneficial characteristic before selection had time to act.
Blending inheritance was discarded with the general acceptance of particulate Mendelian inheritance during the development of modern genetics after 1900.