BIOL 1202 Chapter : Chapter 23
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The smallest unit of evolution: one common misconception about evolution is that individual organisms evolve during their lifetime, evolutionary processes (e. g. , natural selection) acts on individuals, but populations evolve. The hardy-weinberg equation can be used to test whether a population is evolving (concept. 23. 3: populations, a group of individuals of the same species living in a certain defined area. If the frequency of the recessive allele is 30%, the frequency of the heterozygous carriers would be ___ %: 42% In smaller populations, chance events can have a dramatic effect on gene frequency. **a population of seedcracker finches has small- and large-billed birds specializing in soft and hard seeds, respectively. If climatic change resulted in a loss of the soft-seeded plants, what type of selection would then operate on the finch population: directional. Sexual selection: type of selection that favors a trait giving an individual a competitive edge in attracting or keeping a mate, can result in sexual dimorphism.
