Abstract
VANDEL1 has found that in the woodlouse, Tri-choniscus provisorius, there occur both amphogenic broods (broods containing approximately equal numbers of both sexes) and monogenic broods (broods consisting of one sex only or very nearly so). He accounts for the occurrence of arrhenogenic broods (broods consisting of males only) and thely-genie broods (broods containing only females) by suggesting that in woodlice the female is the heterozygous sex (chromosomes XY) and that the segregation of the sex chromosomes in monogenic females is controlled by the cytoplasm. Thus in arrhenogenic females every egg receives an X chromosome and the Y chromosome always passes into the first polar body. Such a female, therefore, produces broods containing only males.
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References
Vandel, A., Bull. Biol. France et Belg., 72, 147 86 (1938).
Howard, H. W., NATURE, 142, 1038, (1938).
Vandel, A., C.R., 203, 1050 52 (1939).
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HOWARD, H. Monogenic Broods in Armadillidium Vulgare Latr.. Nature 144, 979 (1939). https://doi.org/10.1038/144979a0
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DOI: https://doi.org/10.1038/144979a0
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