"ALTERNATE-2" DISJUNCTION DOES NOT EXIST

John and Lewis (1965) proposed a model of disjunction of translocation heterozygotes that defined two types of alternate disjunction, alternate-1 and alternate-2, differing from the classic view of only one type. Endrizzi (1974), and subsequent workers citing him, claim to have observed two distinct...

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Bibliographic Details
Published in:	Genetics (Austin) Vol. 100; no. 3; pp. 505 - 509
Main Author:	Boussy, Ian A
Format:	Journal Article
Language:	English
Published:	United States Genetics Soc America 01-03-1982
Subjects:	Investigations
Online Access:	Get full text
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Summary:	John and Lewis (1965) proposed a model of disjunction of translocation heterozygotes that defined two types of alternate disjunction, alternate-1 and alternate-2, differing from the classic view of only one type. Endrizzi (1974), and subsequent workers citing him, claim to have observed two distinct alternate disjunction configurations, corresponding to John and Lewis's alternate-1 and alternate-2 types, in meiotic preparations of several species. These observations are based on a two-dimensional interpretation of the three-dimensional phenomenon of disjunction, and are erroneous. In each case the two supposed types are topologically identical. There is only one possible alternate disjunction configuration.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0016-6731 1943-2631 1943-2631
DOI:	10.1093/genetics/100.3.505