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Non-disjunction frequency in male complex Robertsonian heterozygotes of the common shrew

100%

Fedyk S., Chetnicki W.

Acta Theriologica

2010

tom 55

nr 1

1-8

Common shrews display two types of Robertsonian (Rb) heterozygosity: simple (where CIII configurations are formed at meiosis I) and complex (which have longer meiotic chains or rings). Based on an analysis of large sample sizes (over 100) of MII cells per specimen, we estimated the non-disjunction frequency in seven Rb homozygotes and 21 complex Rb heterozygotes (CIV and CV) of Sorex araneus Linnaeus, 1758. The analysis showed high betweenindividual variability. The mean level of non-disjunction in homozygotes (2.01%) was significantly lower than in CIV and CV heterozygotes (4.27% and 5.78%, respectively). The study demonstrated that non-disjunction frequency in male CIV and CV heterozygotes was similar to that in simple heterozygotes in the common shrew.

Sex chromosome meiotic drive in hybrid males of the common shrew [Sorex araneus]

84%

Fedyk S., Bajkowska U., Chetnicki W.

Folia Biologica

2005

tom 53

nr 3-4

Ograniczanie wyników

1 Acta Theriologica

1 Folia Biologica

2 Chetnicki W.

2 Fedyk S.

1 Bajkowska U.

1 2010

1 2005

Wyniki wyszukiwania

Non-disjunction frequency in male complex Robertsonian heterozygotes of the common shrew

Sex chromosome meiotic drive in hybrid males of the common shrew [Sorex araneus]