Open AccessTiming of meiotic crossing‐over in Drosophila melanogaster
Author(s) -
PORTIN PETTER,
SUORMALA TERTTU
Publication year - 1973
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1973.tb01168.x
Subject(s) - meiosis , biology , drosophila melanogaster , chromosomal crossover , interference (communication) , genetics , homologous recombination , chromosome , recombination , precondition , microbiology and biotechnology , dna , gene , telecommunications , channel (broadcasting) , computer science , programming language
Investigations on the effect of temperature shock on crossing‐over frequency and interference in the X chromosome of Drosophila melanogaster revealed that a decrease in recombination frequency due to response of oocytes in an early meiotic stage which is known to be coincidental with DNA synthesis was accompanied by a decrease in interference. It is therefore suggested that crossing‐over and DNA synthesis are not coincidental events, and that the target of temperature treatment is some precondition of exchange. Later in meiosis a minor effect on crossing‐over frequency was observed which was not accompanied by any alteration in interference. This later effect may thus be coincidental with the event of exchange itself.