...that of certain protein molecules. The chromosome theory of heredity states (1) that the hereditary characters of the individual are referable to paired elements (genes) in the germinal material which are held together in a definite number of linkage groups ; (2) that the members of each pair...

...theory is very simple. In the words of Morgan, its greatest proponent : "The theory states that the characters of the individual are referable to paired...germ-cells mature, in accordance with Mendel's first law ; it states that the members belonging to different linkage groups assort independently in accordance...

...a book published in 1926, and the following is a paraphrased rendering of his formulation : (i) the characters of the individual are referable to paired elements (genes) in the germinal material, held together in a definite number of linkage groups ; (ii) the members of each pair of genes separate...

...conceptually nor in any way relate the gene to the character which it controls: The theory states that the characters of the individual are referable to paired...the members of each pair of genes separate when the germ cells mature in accordance with Mendel's second law; it states that an orderly interchange - crossingover...

...Thomas Hunt Morgan gave a succinct statement of this theory: The theory [of the gene] states that the characters of the individual are referable to paired...that the members of each pair of genes separate when their germcells mature in accordance with Mendel's first law, and in consequence, each germ-cell comes...

...1926, Morgan stated what he called 'the theory of the gene': The theory [of the gene] states that the characters of the individual are referable to paired...that the members of each pair of genes separate when their germ-cells mature in accordance with Mendel's first law, and in consequence, each germ-cell comes...

...with the remainder giving details about the inferred behavior of genes: "The theory states that the characters of the individual are referable to paired elements (genes) in the germinal material" (Morgan 1926: 25: emphasis added). No matter how the gene-character relation was expressed, one point...