Chromosomal pairing in deer mice heterozygous for the presence of heterochromatic short arms.

abstract

• The pattern of chromosomal pairing was analyzed in male deer mice (Peromyscus maniculatus and Peromyscus sitkensis) heterozygous for the presence of heterochromatic short arms. G- and C-banding of somatic metaphases indicated that the presence of heterochromatic short arms increased the length of chromosome 4 by 15% in P. sitkensis and that of chromosome 8 by 9% in P. maniculatus. Analysis of silver-stained late zygotene and early pachytene nuclei revealed a low frequency of unequal axial lengths in the synaptonemal complexes corresponding to the heteromorphic bivalents. All mid- and late pachytene nuclei, however, exhibited fully paired synaptonemal complexes with equalized axial lengths. These observations suggest the existence of an adjustment mechanism which functions to equalize the lengths of the two axes of the heteromorphic synaptonemal complex.

authors

• Greenbaum, Ira

published proceedings

• Genome

author list (cited authors)

• Hale, D. W., & Greenbaum, I. F.

citation count

• 8

complete list of authors

• Hale, DW||Greenbaum, IF

publication date

• February 1988

publisher

• Canadian Science Publishing  Publisher

published in

• Genome  Journal

keywords

• Animals
• Cells, Cultured
• Chromosome Banding
• Heterochromatin
• Heterozygote
• Karyotyping
• Microscopy, Electron
• Peromyscus
• Species Specificity

PubMed Central ID

• 3371655

Digital Object Identifier (DOI)

• 10.1139/g88-008

start page

• 44

end page

• 47

volume

• 30

issue

• 1

URL

• http%3A%2F%2Fdx.doi.org%2F10.1139%2Fg88-008