Abstract
Sex chromosomes in Oncopeltus fasciatus and Pyrrhocoris apterus are heterochromatic and transcriptionally inactive in well-defined phases of development. In Oncopeltus, which has the XX/XY type of sex determination, the Y-chromosome seems to be inactive in aE tissues. The X-chromosome is inactivated during the last spermatogonial division and remains so throughout spermatogenesis. The X-chromosome of Pyrrhocoris, which is of the XX/XO type of sex determination is inactive in the same stages as that of Oncopeltus and during an additional phase in early oogenesis. X inactivation in spermatogenesis is interpreted as a form of gross regulation of gene activity on the chromosomal level.
Original language | English |
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Journal | Caryologia |
Volume | 28 |
Issue number | 4 |
Pages (from-to) | 501-510 |
Number of pages | 10 |
ISSN | 0008-7114 |
DOIs | |
Publication status | Published - 01.01.1975 |
Research Areas and Centers
- Academic Focus: Center for Infection and Inflammation Research (ZIEL)