
audiobook
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In this pioneering study of chicken genetics, the author presents a series of methodical experiments that probe how dominant traits are passed down and how their strength can vary. From the striking Y‑shaped comb to extra digits and fused toes, each case illustrates a spectrum where dominance can be complete, weak, or even fail to appear in offspring. The careful breeding records reveal patterns that challenge simple dominant‑recessive labels, showing that potency itself can be inherited.
The narrative then moves to traits that seem to blend, such as feather crests, booting behavior, and nostril dimensions, demonstrating that even seemingly continuous characteristics follow rules of segregation. By comparing the wildly variable progeny of extracted dominants with the steadier lines of recessives, the work uncovers practical criteria for distinguishing hidden genetic factors. Listeners will gain a vivid appreciation of how early twentieth‑century experiments laid groundwork for modern concepts of quantitative inheritance.
Language
en
Duration
~4 hours (243K characters)
Series
Carnegie Institution of Washington publication no. 121
Publisher of text edition
Project Gutenberg
Credits
Produced by Frank van Drogen, Nicole Pasteur, Bryan Ness and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/Canadian Libraries)
Release date
2015-02-17
Rights
Public domain in the USA.

1866–1944
A leading American biologist who helped bring statistics and Mendelian ideas into early genetics, he is remembered even more for shaping the American eugenics movement. His career sits at the uneasy crossroads of scientific ambition and a legacy now widely condemned.
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