Genetic Diversity Essay

433 words - 2 pages

Kaylee Thelen
Genetic Diversity

Generally speaking, there are numerous issues related to genetic diversity which include mutations, sexual reproduction, migration, and population size. Genetic diversity, or the level of biodiversity, refers to the total number of genetic characteristics in the genetic makeup of a species. Biodiversity is the degree of variation of life forms within a given ecosystem, biome, or an entire planet.

To begin, a mutation is a permanent change in the DNA sequence of a gene. Mutations can be caused by many different things. They can be caused by radiation and can also be induced by the organism itself. This process is called ...view middle of the document...

Mutations can be grouped in two types. One is Spontaneous mutations and the other is Induced Mutations.

Then you have sexual reproduction. Sexual reproduction is the formation of a new individual following the union of two gametes. These gametes have specific needs. A gamete has to meet and unite together. They also must have food to nourish the developing embryo. If you were to look at human beings, the males carry sperm which are small and motile. The female carry eggs which provide food for the embryo. In a male his sex organs main purposes are to produce the sperm and deliver it in the reproductive tract of a female.

Gene migration is also known as gene flow. This is the transfer of alleles of genes from one population to another. There are a number of factors that affect the rate of gene flow between different populations. One of the most significant factors is mobility, as greater mobility of an individual tends to give it greater migratory potential.

Animals tend to be more mobile than plants, although pollen and seeds may be carried great distances by animals or wind. Population Size is the number of individual organisms in a population. It is said that population genetics, a small population size increases genetic drifting. Sometimes a population size may reduce for a short period of time. On the other hand, it is possible to become overpopulated as well. Overpopulation occurs when an organism’s number exceeds its carrying capacity within its habitat.

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