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ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X

The inheritance of elements of geotropic performance in lines of rats (A and B) has been investigated by examining the orientation of young offspring produced in matings of F(1(AxB)) with A: Previous studies had shown that the three recognizable groups of receptor elements concerned in geotropic ori...

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Detalles Bibliográficos
Autores principales: Crozier, W. J., Pincus, G.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1936
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141490/
https://www.ncbi.nlm.nih.gov/pubmed/19872981
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author Crozier, W. J.
Pincus, G.
author_facet Crozier, W. J.
Pincus, G.
author_sort Crozier, W. J.
collection PubMed
description The inheritance of elements of geotropic performance in lines of rats (A and B) has been investigated by examining the orientation of young offspring produced in matings of F(1(AxB)) with A: Previous studies had shown that the three recognizable groups of receptor elements concerned in geotropic orientation in each of these lines appeared to be inherited in such a way that B groups were dominant with respect to A groups, although this was to a minor extent complicated by influences affecting the variation of orientation as well as the exact form of the curve relating orientation angle (θ) to slope of surface. In the backcross F(1) x A, therefore, at least eight different types of curves were to be expected. These are in fact identifiable among the forty-one individuals carefully studied. Their classification is concordant with the behavior of the respective indices of variation of θ, for which an interpretation has been provided. The basic result is, therefore, that the three receptor groups of excitation units are inherited independently, and alternatively as regards the members of a homologous pair, and that rather simple dominance relations obtain between homologous groups from the two races, namely that a B effect is dominant over the homologous A effect. This interpretation has been tested in various ways, and is in principle completely consistent with the results of a similar experiment involving races A and K.
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spelling pubmed-21414902008-04-23 ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X Crozier, W. J. Pincus, G. J Gen Physiol Article The inheritance of elements of geotropic performance in lines of rats (A and B) has been investigated by examining the orientation of young offspring produced in matings of F(1(AxB)) with A: Previous studies had shown that the three recognizable groups of receptor elements concerned in geotropic orientation in each of these lines appeared to be inherited in such a way that B groups were dominant with respect to A groups, although this was to a minor extent complicated by influences affecting the variation of orientation as well as the exact form of the curve relating orientation angle (θ) to slope of surface. In the backcross F(1) x A, therefore, at least eight different types of curves were to be expected. These are in fact identifiable among the forty-one individuals carefully studied. Their classification is concordant with the behavior of the respective indices of variation of θ, for which an interpretation has been provided. The basic result is, therefore, that the three receptor groups of excitation units are inherited independently, and alternatively as regards the members of a homologous pair, and that rather simple dominance relations obtain between homologous groups from the two races, namely that a B effect is dominant over the homologous A effect. This interpretation has been tested in various ways, and is in principle completely consistent with the results of a similar experiment involving races A and K. The Rockefeller University Press 1936-09-20 /pmc/articles/PMC2141490/ /pubmed/19872981 Text en Copyright © Copyright, 1936, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Crozier, W. J.
Pincus, G.
ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X
title ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X
title_full ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X
title_fullStr ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X
title_full_unstemmed ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X
title_short ANALYSIS OF THE GEOTROPIC ORIENTATION OF YOUNG RATS. X
title_sort analysis of the geotropic orientation of young rats. x
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141490/
https://www.ncbi.nlm.nih.gov/pubmed/19872981
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