ID# 1976:
"Theory of Ancestral Contributions in Heredity," handwritten manuscript by Karl Pearson, published in Proceedings of the Royal Society (vol. 81:547)
Date:
1909
Pages: (1|2|3|4|5|6|7|8|9|10|11|12)
Source:
University College London, KP, 198

&quote;Theory of Ancestral Contributions in Heredity,&quote; handwritten manuscript by Karl Pearson, published in Proceedings of the Royal Society (vol. 81:547)

[handwritten] 6 [tabular material][underscore]No. of DR's in Grandparentage & Percentage of DR's in Offpspring[end underscore] 4 & 50 3 & 50 2 & 50 1 & 50 0 & 50 [end tabular material] At first sight this seems to indicate that there is no ancestral influence, where we should expect by increasing the number of DR's in the grandparentage to increase the number in the offspring. But this criticism is not valid, for in the population we are dealing with, it is clear that DR is the modal or mean group, and that accordingly it is perfectly neutral in determining the regression or correlation of the gametic character. In other words the deviations of the DR ancestry from the mean population gametic character are all zero and accordingly they have no weight, in causing the offspring to deviate from the population norm. They have in fact no more effect on the offspring than in the case of stature[?] a number of mediocre ancestors have in raising or lowering the average of deviation of the offspring from the general population mean. Lastly turning from the gametic constitution [end]

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