Abstract:
:An examination of the chiasma distribution in chromosome 1 of male mice homozygous and heterozygous for a distal inversion In(1) 12Rk and in normal males was carried out. No differences in chiasma distribution were found between homozygotes for the inversion and homozygotes for normal chromosome 1. A significant decrease in the frequency of bivalents bearing chiasmata in the pretelomeric region was found in heterozygotes. This, in its turn, produced a redistribution of chiasmata in the proximal non-inverted part of bivalent 1. These results could be interpreted as evidence for positional control of the chiasma distribution pattern: the distance of certain parts of the chromosome from the telomere and chiasmata interference are more important for determination of the chiasma frequency in a given region than its genetic content.
journal_name
Heredity (Edinb)journal_title
Heredityauthors
Gorlov IP,Ladygina T Yu,Serov OL,Borodin PMdoi
10.1038/hdy.1991.55subject
Has Abstractpub_date
1991-06-01 00:00:00pages
453-8eissn
0018-067Xissn
1365-2540journal_volume
66 ( Pt 3)pub_type
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