Summary
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1.
The translucent factor found in an Italian race,Giallo puro indigeno, is sex-linked.
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2.
The linkage in the silkworm belongs to theAbraxas type.
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3.
Besides the sex-linked translucent, there are some other multiple translucent factors which are inherited independently of sex. When sex-linked and non-sex-linked translucent strains are crossed together, very peculiar F2 ratios are obtained.
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4.
The number of translucent silkworms, especially females, are, as a rule, below theoretical expectations. The actual cause of this is not yet clear.
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Literature
Bateson, W. 1909.Mendel’s Principles of Heredity. Cambridge.
Bridges, C. B. 1913. “Non-disjuuction of Sex Chromosomes of Drosophila.”Jour. Exp. Zool. xv.
Morgan and Others. 1915.The Mechanism of Mendelian Heredity. New York.
Tanaka, Y. 1916. “Genetic Studies iu the Silkworm.”Jour. Tohoku Imp. Univ. Sapporo, vii.
- 1917. “Sex-linked Inheritance in the Silkworm.” (In Japanese.)Report of Japanese Sericult. Assoc.
- 1919.Lectures on Heredity in Silkworms. (In Japanese.) Tokyo.
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Tanaka, Y. Sex-Linkage in the silkworm. Journ. of Gen. 12, 163–178 (1922). https://doi.org/10.1007/BF02983079
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DOI: https://doi.org/10.1007/BF02983079