Skim coating weak concrete is only a temporary fix. Another option is to lay a thicker overlay and slow-dry the new surface. To slow-dry, cover the driveway with moist, breathable material. Keep the material wet to provide additional moisture for the concrete to absorb.
The two main sources of genetic variation are gene shuffling and  mutations. A mutation is a process wherein the structure of a gene  is altered.Edit. Share to: Blobbert. 37,033 Contributions. Answered.In Genetic Engineering.he 4 types of genetic variation are 1) mutation-is the mutation of a gene. this is really rare, most mutations are in the recessive trait so they are hidden by a dominant t â¦ rait. Most mutations have no effect but some can be harmful and very few have positive effects.
Genetic variability (vary + liable-to or capable of change) is the ability, i.e. capability of a biological system â individual and population â that is changing over time. The base of the genetic variability is genetic variation of different biological systems in space.Genetic variability is a measure of the tendency of individual genotypes in a population to vary from one another, also.Variability is different from genetic diversity, which is the amount of variation seen in a particular population.The variability of a trait describes how much that trait tends to vary in response to environmental and genetic influences. Homologous recombination is a significant source of variability. 2  During meiosis in sexual organisms, two homologous chromosomes from the male and female parents cross over one another and exchange genetic material.