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which of the following are classified as human sex chromosomes?
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- 32. Assume that you find a population of finches in which the members have a bimodal distribution in bill size. Someindividuals have a significantly larger bill than others, regardless of sex. Under which condition could disruptiveselection maintain this bimodal distribution of bill size?A) The population has two major food sources that differ markedly in size.B) Bills of the intermediate size are difficult to form.C) In the original population, all of the birds had large bills, but there is continual immigration of birds with small billsinto the population.D) Males use their bills in two different forms of sexual display.E) Directional selection cannot act on bill size.
- 1. 2 groups of similar birds2. Some individuals move between populations through random migration causing gene flow3. Natural disaster occurs, barring migration and gene flow. 4. Natural selection and sexual selection continues in the 2 populations, creating new traits in both populations5. If now reintroduced, females from one group will most likely not reproduce with the other group 6. Genetic drift and mutation continue to accumulate genetic differences between the 2 groups and eventually creates a new species
- On a species level, mass extinctions function most analogously to: