1. A desert oasis contains 10,000 fruit flies, initially in Hardy-Weinberg equilibrium (p=0.50). A seasonal drought then

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1 A Desert Oasis Contains 10 000 Fruit Flies Initially In Hardy Weinberg Equilibrium P 0 50 A Seasonal Drought Then 1 (101.76 KiB) Viewed 39 times

1. A desert oasis contains 10,000 fruit flies, initially in Hardy-Weinberg equilibrium (p=0.50). A seasonal drought then causes 9,990 of these fruit flies to die, leaving only 10 survivors by the time that a rainstorm finally restores water to the oasis. The colony then inereases in size again, recovering its initial population size by 9,990 births (not by receiving new immigrants). These violations of the Hardy-Weinberg equilibrium are most likely to cause: A. no change in heterozygosity of the restored colony compared to the ancestral colony B. increased heterozygosity of the restored colony compared to the ancestral colony C. decreased heterozygosity of the restored colony compared to the ancestral colony D. all of the above E. none of the above 2. After the above ancestral colony is restored to its initial size (following the Hardy-Weinberg equilibrium violations described), it is most likely to exhibit which of these genotype changes? a new homozygous recessive genotype frequency of 17% B. a new heterozygous genotype frequency of 52% C. a new homozygous recessive genotype frequency of 21% D. a new heterozygous genotype frequency of 38% E. a new homozygous dominant genotype frequency of 24% 3. The above population is displaying which of the following gene flow and genetic dritt effects? A. low emigration, low immigration, and high genetic drift B. high emigration, high immigration, and high genetic drift C. high emigration, low immigration, and low genetic drift D. high emigration, high immigration, and low genetic dritt E. low emigration, high immigration, and low genetic dritt 4. Which of the following animal populations is showing effects similar to the above fruit flies? A. the North American whooping crane B. the North African cheetah C. the Southern humpback whale D. the red-billed quelea B. the Northem cardinal 5. Robert Selander's observations of elephant seal populations (Mirounga angustixostris), on the Pacific coast of North America, suggested which of the following inferences? A. 24 ancestral monomorphic genes had become polymorphic, probably due to bottieneck effects B. 24 ancestral polymorphic genes had become monomorphic, probably due to immigration C. 24 ancestral monomorphic genes had become polymorphic, probably due to the founder effect D. 24 ancestral monomorphic genes had become polymorphic, probably due to gene flow B. 24 ancestral polymorphic genes had become monomorphic, probably due to genetic drift