Chromosome Interactions in DROSOPHILA MELANOGASTER. I. Viability Studies |
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Authors: | Robert D Seager and Francisco J Ayala |
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Institution: | Department of Genetics, University of California, Davis, California 95616 |
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Abstract: | The nature of fitness interactions is an important, yet unsolved, question in population genetics. We compare the egg-to-adult viability of individuals homozygous for either a second or a third chromosome with the viability of individuals homozygous for both chromosomes simultaneously. On the average, the viability of the two-chromosome homozygotes is somewhat greater than expected assuming that the fitnesses of the single-chromosome homozygotes interact in a multiplicative fashion. This result differs from previous observations that indicate either no significant deviations from the expectation or lower-than-expected average fitnesses for the double homozygotes. |
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