Nursing Mirror mental health forum. Making decisions.
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Biomedical subjects
Publications and source records attributed to J Chalkley.
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The ovarian polytene chromosomes of females of species A of the Anopheles gambiae complex, from colonies suspected of containing heterozygous translocations, were examined. In three lines, the presence of translocations was confirmed and the chromosomes involved in the interchanges identified. The usefulness of cytogenetic methods for the detection of translocations is discussed.
In a study on the linkage between the gene for dieldrin resistance and an inversion on the second chromosome in Anopheles stephensi, the two factors were found to assort independently. As dieldrin resistance can be assigned either to the third chromosome, or to a position on the second chromosome more than 50 cross-over units from the inversion.