HSCI 324 Lecture Notes - Lecture 1: Sickle-Cell Disease, Allele Frequency, Plasmodium
2 Feb 2021
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The three premises: dna can replicate, dna mutates and recombines, the information in dna from reproducing populations interact with the environment to produce traits. Dna can make copies of itself and be passed on to subsequent generations. The same dna molecule or segment of dna can have identical copies in several individuals simultaneously. Although individuals cannot be at more than one place at a given time, but identical copies of dna can exist at many places simultaneously because they can be borne by multiple individuals. A unique dna change (mutation) has an existence in multiple spaces and times that transcends individuals who temporarily bear it. That observation cannot be observed in a single individual but must be studied in a reproducing population of individuals. A population consists of multiple individuals at any given time and occupies some area of space. A reproducing population provides the spatial and temporal continuity that is necessary for evolution.
