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major gene
Major gene is a gene with pronounced phenotype expression, in contrast to modificator gene. Major gene characterizes common expression of oligogenic series, i.e. a small number of genes that determine the same trait.
Major genes control the discontinuous or qualitative characters in contrast of minor genes or polygenes with individually small effects. Major genes segregate and may be easily subject to mendelian analysis. The gene categorization into major and minor determinants is more or less arbitrary. Both of the two types are in all probability only end points in a more or les continuous series of gene action and gene interactions.〔Rieger R. Michaelis A., Green M. M. (1976): Glossary of genetics and cytogenetics: Classical and molecular. Springer-Verlag, Heidelberg - New York, ISBN 3-540-07668-9; ISBN 0-387-07668-9.〕〔King R. C., Stransfield W. D. (1998): Dictionary of genetics. Oxford University Press, New York, Oxford, ISBN 0-19-50944-1-7; ISBN 0-19-509442-5.〕
The term major gene into the science of inheritance was introduced by Keneth Mather (1941).〔Mather K. (1941): Variation and selection of polygenetic characters. J. Genet., 41: 159.〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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