"Human male chromosomes showing mutation on chromosome 7." World of Genetics. Gale, 2010. Gale Science In Context. Web. 19 Apr. 2011.
"Photomicrograph of human chromosomes showing male mutation on gene 7, which determines cystic fibrosis."
A mutation is the change of DNA. Mutation can be neutral, harmful or beneficial.
Neutral Mutation: A mutation that has no effect on the organism. Example: One brown eye-color and one blue eye-color.
Harmful Mutation: A mutation which reduces an organisms reproductive success. Example: down syndrome and cystic fibrosis (human diseases)
Beneficial Mutation: A mutation which improves or enhances reproductive success. Example:
"A specific 32 base pair deletion in human CCR5 (CCR5-Δ32) confers HIV resistance to homozygotes and delays AIDS onset in heterozygotes."
"Mutation." World of Genetics. Gale, 2007. Gale Science In Context. Web. 19 Apr. 2011.
"Mutation." Wikipedia. N.p., n.d. Web. 19 Apr. 2011. <http://en.wikipedia.org/
wiki/Mutation#Beneficial_mutations>.
wiki/Mutation#Beneficial_mutations>.
Sexual Reproduction:
"Sexual reproduction is the creation of new individuals resulting from the joining of the nuclei of two separate
sex cells (sperm and egg)."
Gene Pool:
A gene pool is the genetic material in a population of "sexually reproducing organisms." Small gene pools have
more of a tendency to die quicker compared to larger gene pools.
"Gene pool." World of Biology. Gale, 2006. Gale Science In Context. Web. 19 Apr. 2011.
"Reproduction, sexual." World of Biology. Gale, 2006. Gale Science In Context. Web. 19 Apr. 2011.
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