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- W1974414456 abstract "In order to substantiate evidence and explore further details of frequency dependency between third chromosome arrangements in Drosophila pseudoobscura populations, multiple-choice mating experiments involving karyotypes of Arrowhead (AR) and Pikes Peak (PP) gene arrangements were designed to measure relative mating propensity with frequencies of karyotypes varied in one sex or in both sexes. Ten strains each of AR and PP crossed inter se as in previous experiments contrast in being fastest (75% mated) and slowest (20%) mated, respectively, in homokaryotype no-choice matings of 30 min. duration. Twenty pairs of strain-cross F1 flies, 6 days old, were introduced unetherized into small Plexiglas chambers and observed for 30 min. Flies had been marked to distinguish karyotypes by puncturing a wing on the day before the mating tests. Two contrasting types of both sexes were tested each time to measure relative propensities, total mating frequency, and any assortative mating. Ratios of karyotypes and conditions were varied as follows: (1) AR/AR: PP/PP from 2:18, 4:16, by intervals of 1/10 to 18:2 among males while females of the same karyotypes were kept at equality (10:10); (2) the reciprocal of (1), namely, from 2:18 to 18:2 among females while males remained 10:10; (3) both sexes varied simultaneously in the same direction; and (4) heterokaryotype AR/PP versus homokaryotype AR/AR varied from 2:18 to 18:2 among males with females of the same karyotypes at equality." @default.
- W1974414456 created "2016-06-24" @default.
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- W1974414456 date "1968-07-01" @default.
- W1974414456 modified "2023-09-25" @default.
- W1974414456 title "Low Frequency Advantage in Mating of Drosophila pseudoobscura Karyotypes" @default.
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- W1974414456 doi "https://doi.org/10.1086/282549" @default.
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