A scientist samples a population of Anagallis arvensis (a plant) that are commonly in orange and blue variations. She makes a note of the population as 25 of the flowers being orange and the other 25 being blue. She comes back 5 years later and notices that the color distribution has changed to 20 orange, 25 blue, and 5 red. If the ecology of the flowers had not changed over time, what could explain the change in color? A. Genetic Drift B. Natural Selection C. Gene Flow
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This means that the population is in a state of equilibrium, where both variations have equal frequencies. Five years later, the scientist observes a change in the color distribution, with 20 Orange, 25 Blue, and 5 Red variations. This change cannot be explained Show more…
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One population of a species has 25 individuals, all with genotype $A A ;$ a second population of this species has 40 individuals, all with genotype $a a .$ Assume that these populations live far apart but in similar environmental conditions. Based on this information, the observed genetic variation most likely resulted from (A) genetic drift. (C) nonrandom mating. (B) gene flow. (D) directional selection.
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