Related Experiment Video
Updated: Aug 11, 2026

Assessing Differences in Sperm Competitive Ability in Drosophila
Published on: August 22, 2013
On measures of gametic disequilibrium
1Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts 02138.
Abstract:
Various measures have been proposed for characterizing the statistical association that arises between alleles at different loci. Hedrick has compared these measures with the standardized measure D' proposed by Lewontin on the grounds that this latter measure is independent of allele frequency. Although D' has the same range for all allelic frequencies, in fact, D' is not "independent" of allele frequency, and no measure with that general property is possible for the multilocus association problem. The insolubility of this problem arises from the ill-defined nature of general "association."
Related Concept Videos
Meiosis II
Hardy-Weinberg Principle
Nondisjunction
The Ratio of X Chromosome to Autosomes
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Meiosis II
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
Nondisjunction

