Positional control of chiasma distribution in the house mouse. Chiasma distribution in mice homozygous and heterozygous for an inversion in chromosome 1.

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

Heredity

authors

Gorlov IP,Ladygina T Yu,Serov OL,Borodin PM

doi

10.1038/hdy.1991.55

subject

Has Abstract

pub_date

1991-06-01 00:00:00

pages

453-8

eissn

0018-067X

issn

1365-2540

journal_volume

66 ( Pt 3)

pub_type

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