02505cam a22003373u 450000100060000000300070000600500170001300600020003000700050003200800410003701000130007804000110009104100170010205000070011910000530012624500310017926400510021030000470026133600260030833700260033433800360036049000590039650000310045550802040048652012280069053400840191865300130200270000500201583000590206585600430212474375UtSlPG20260610134724.0mcr n260607r20241914utu|||||o|||||||||||||| d  a14004274  aUtSlPG 7aen2iso639-1 4aQH1 aCastle, William E.q(William Ernest),d1867-196210aPiebald rats and selection 1aSalt Lake City, UT :bProject Gutenberg,c2024  a1 online resource :bmultiple file formats  atextbtxt2rdacontent  acomputerbc2rdamedia  aonline resourcebcr2rdacarrier1 aCarnegie Institution of Washington publication no. 195  aRelease date is 2024-09-05  aBrian Wilson, Bryan Ness and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/Canadian Libraries)  a"Piebald Rats and Selection" by W. E. Castle and John C. Phillips is a scientific publication written in the early 20th century. This work explores the genetic principles of heredity through experimental tests involving the selection of piebald rats. Its primary focus is on the effectiveness of selection in relation to Mendel's laws, specifically examining the gametic purity within Mendelian crosses.  The opening of the text lays a foundation for the investigation into hereditary traits by outlining the significance of Mendelian genetics among biologists. It notes that while there is a general agreement about some aspects of Mendel's theory, significant disagreement exists regarding the nature and function of genetic determiners. The authors describe a multi-year experiment investigating the color patterns of over 25,000 rats aiming to understand how selection influences genetic traits in both positive and negative directions. They introduce the concept of both plus and minus selection series and hint at how their findings challenge prevailing theories regarding pure gametes, setting the stage for detailed empirical results that follow in subsequent chapters. (This is an automatically generated summary.)  pOriginally published:cWashington, DC: Carnegie Institution of Washington, 1914  aHeredity1 aPhillips, John C.q(John Charles),d1876-1938 0aCarnegie Institution of Washington publication no. 19540uhttps://www.gutenberg.org/ebooks/74375