Related Experiment Video
Updated: Aug 17, 2026

Assessing Differences in Sperm Competitive Ability in Drosophila
Published on: August 22, 2013
[Inversion polymorphism in populations of Drosophila lummei, Hackman]
Abstract:
Four population inversions have been revealed in the chromosomes set of Drosophila lummei, Hackman, two of them being found for the first time. The new inversions (5S and 5R) are only typical of individuals from the Finnish population. The lines analysed are heterogeneous for inversions 4R and 4S. Individuals with the inversion 4R outnumber those with the 4S. In the USSR we found no predominance of these inversions in the D. lummei populations. The breaking points of the new inversions (5S and 5R) were located, and the boundaries of earlier described inversions in chromosome 4 were specified.
More Related Videos
Related Concept Videos
Position-effect Variegation
Incomplete Dominance
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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...
Dosage Compensation
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...

