Cod live in both warm and very cold parts of the ocean.  All cod have a gene for an antifreeze protein called Antifreeze glycoprotein (AFGP). Propose a potential change in the genome that would increase the cold adaptation for the cod that live in the Antarctic Ocean. Explain how natural selection and random genetic drift could act on this change. If you were to sample cod from many different environments what variation would you expect at the AFGP locus?

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.