How small are smallest selectable domains of form? Multiple paternity and genomic imprinting
How small are smallest selectable domains of form?
Lines of Drosophila melanogaster from a single base populations were studied to determine the smallest possible limits of localized selectable effects within the base of their wings. The region was selected because it offered the tightest cluster of detectable markings on the wings of the insects. Results demonstrated that segment of wing-vein network possessed its own differentiable genetic variability that enabled the selection of its form. Small adjacent elements exhibited inverse shrinking and expansion abilities. The study showed polymorphism in late-acting genes with the smallest localized effects on the development of form.
Author: Weber, K. E.
Physiological aspects, Insects, Drosophila, Animal morphology
Multiple paternity and genomic imprinting
Some of the results of studies conducted by H.G. Spencer, et al, invite comment. The authors came up with conclusions that contradicted their models and the genetic-conflict hypothesis. They also used diallelic models that were not appropriate for modeling long-term evolutionary changes. However, the scientists correctly stated that stable polymorphism is not determined by the genetic-conflict hypothesis in current form.