The decentric nature of the metacentric B chromosome of Metaleptea brevicornis adspersa (Acridinae, Acrididae)
Article Abstract:
The meiotic behavior of a large B isochromosome of Metaleptea brevicornis adspersa (Acridinae, Acrididae) has been studied in both sexes and two models for the origin of isochromosomes postulated. In males both arms of the B chromosome synapse at zygotene-early pachytene and suggest its isochromosomal nature. The dicentric nature of the N was confirmed by silver staining of kinetochores at metaphase I and anaphase II stages. A dicentirc B isochromosome has not previously been described.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2000
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The effects of Robertsonian fusions on chiasma frequency and distribution in the house mouse (Mus musculus domesticus) from a hybrid zone in northern Scotland
Article Abstract:
Robertsonian fusions and their effects on chiasma frequency and distribution in male house mice have been studied in a hybrid zone in northern Scotland. A differential effect of heterozygous and homozygous Rb fusions on chiasma frequency and localization in male mice from the hybrid zone is described.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2001
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No harmful effects of a selfish B chromosome on several morphological and physiological traits in Locusta migratoria (Orthoptera, Acrididae)
Article Abstract:
The analysis of possible effects of B chromosomes in Locusta migratoria, migratory locusts, in Spain, on several physiological and morphological traits and some other traits that pertain to female fitness is discussed. No harmful effects of a selfish B chromosome are seen on several morphological and physiological traits, and B chromosomes were not seen to be strongly parasitic in the studied population.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 1998
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