allelic frequency

This is from a discussion of genotype variation in the biology class that I have been taking. Today was the last day of the class. I didn't expect to feel this way but I'm kind of sorry its over. The subject matter was actually starting to become interesting to me.

The allelic frequencies in a population such as the US will have greater shifts than a country such as China due to the greater range of genetic variation. Persons of various racial backgrounds reside in a country such as the United States whereas a country such as China is reasonably homogenous for phenotype and thus presumably also fairly homogenous in it range of genotypes. If there were an influx of immigrants of other racial types to China over the next 25 years, there would be new alleles introduced into the offspring of couples of mixed racial types. This would cause a greater variation in alleles.

Exciting Info about Reproduction

Sexual reproduction provides genetic diversity through recombination. This genetic diversity may serve the population well as the environment changes or as the population expands into new environments. The adaptability resulting from genetic diversity is the major advantage of sexual reproduction over asexual reproduction, although sexual reproduction can also break up well-adapted combinations of alleles through the same process of recombination.
Asexual reproduction is the only way of raising plants such as navel oranges, all of which have been reproduced from a single tree found in on a plantation on the Brazilian coast in the early 19th century.
http://www.filefarmer.com/2/successus/Books/Ch39.pdf