For some characteristics, such as maize or sorghum grain colour, there is a great level of genetic variation in nature. This constant shift of genetic makeup helps to maintain a healthy population of plankton despite complex and unpredictable environmental changes.
Genetic diversity of sorghum left and millet right illustrates the potential of plant breeding. Even so, the diversity within the lines allowed great variation in the gene pool that may help to protect the South American sea lion from extinction.
Most new mutations either have a neutral or negative effect on fitness, while some have a positive effect. This may mean that a species may not be able to adapt to changes in environmental conditions.
As the adaptation becomes more pronounced, the new species or race radiates from its entrance into the new space, or dies out if it cannot adapt and, most importantly, reproduce. Plant breeders can also make use of the gene pool of closely related species that can cross and produce fertile hybrids called interspecific hybrids.
The male emerges as well, but does not look for food or new mates, and dies after a few hours. Mutation rates differ across the genome, and larger populations have greater mutation rates.
Mutation[ edit ] Random mutations consistently generate genetic variation. Historical analysis indicated that a population expansion from just two matrilineal lines was responsible for most of the individuals within the population. In biology, a species is one of the basic units of biological classification, defined as a group of organisms capable of interbreeding and producing fertile offspring, or as a separately evolving lineage with a single gene pool.
Genetic diversity of a population can be assessed by some simple measures. Researchers found far greater genetic heterozygosity than expected.
Natural breedings include inbreeding by necessity, and most animals only migrate when necessary. High genetic diversity results in difficulty in designing targeted vaccines, and allows for viruses to quickly evolve to resist vaccination lethality.
By planting rows of unrelated, or genetically distinct crops as barriers between herbivores and their preferred host plant, the farmer effectively reduces the ability of the herbivore to spread throughout the entire plot. For example, eight panthers from Texas were introduced to the Florida panther population, which was declining and suffering from inbreeding depression.
Inbreeding depression can also occur in a large population if individuals tend to mate with their relatives, instead of mating randomly. Gene flow can introduce novel alleles to a population. In the prides, most lionesses are related to one another.
The two main ways are the path method   and the tabular method. The genetic diversity was increased in A.Among the ethical issues of surrogacy is the exploitation of the poor who donate sperms and eggs for surrogate parents who have the wherewithal to have test tube babies and to determine the genetic make-up of these babies.
While linebreeding is less likely to cause problems in the first generation than does inbreeding, over time, linebreeding can reduce the genetic diversity of a population and cause problems related to a too-small gene pool that may include an increased prevalence of genetic disorders and inbreeding depression.
Discuss the issues related to genetic diversity: mutations, sexual reproduction, migration, and population size.
Solution: Genetic diversity is a branch of Biology which refers to large number of different species that can be found on earth as well the diversity within a particular species.
Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.
Genetic diversity serves as a way for populations to adapt to changing environments. Genetic Diversity Essay. Before we begin to discuss the issues related to genetic diversity, we have to know exactly what genetic diversity is all about. It is a " term used to describe genetic differences among members of a population", according to Concepts in Biology 12th Edition written by Eldon Enger.
- Discuss the issues related to genetic diversity: mutations, sexual reproduction, migration, and population size Genetic diversity: Genetic diversity ids defined as the diversity or genetic variability within species. Every species possesses genes which are the source of its own unique features.Download