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Disjunction types and their frequencies in two heterozygous reciprocal translocations of Blattella germanica (L.) by Donald G. Cochran is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Disjunction types and their frequencies in two heterozygous reciprocal translocations of Blattella germanica (L.) about?

Adjacent-1, alternate-1, adjacent-2, and alternate-2 disjunction configurations were observed cytologically at metaphase I in heterozygotes from two reciprocal chromosome translocations in the German cockroach, Blattella germanica (L.). T(7; 12) shows random disjunction and the frequencies of the above four types were in a ratio of 2:1:1:2 (p greater than 0.90). T(3; 12) has directed disjunction (about 70% alternate) which is attributable to a heavy preponderance of alternate-2. No interpretable ratio occurs here except for the equality of alternate-1 and adjacent-2 types. These observations confirm the existence of two types of alternate disjunction, and provide insight into the basis for random vs directed disjunction.

Who reads Disjunction types and their frequencies in two heterozygous reciprocal translocations of Blattella germanica (L.)?

Author

Donald G. Cochran

Publisher

Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0009-5915)

Published

1976

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)