The problem: Answer a question about this article:
When multiple different alleles for a gene are present in a species's population it is called polymorphic. Most different alleles are functionally equivalent, however some alleles can give rise to different phenotypic traits. A gene's most common allele is called the wild type, and rare alleles are called mutants. The genetic variation in relative frequencies of different alleles in a population is due to both natural selection and genetic drift. The wild-type allele is not necessarily the ancestor of less common alleles, nor is it necessarily fitter.
What can some alleles give rise to?
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The answer: different phenotypic traits


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Transport in the Republic of the Congo includes land, air and water transportation. The country's rail system was built by forced laborers during the 1930s and largely remains in operation. There are also over 1000 km of paved roads and two major international airports (Maya-Maya Airport and Pointe Noire Airport) which have flights to Paris and many African cities. The country also has a large port on the Atlantic Ocean at Pointe-Noire and others along the Congo River at Brazzaville and Impfondo.
What forms of transport are available in the Congo?
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The answer: land, air and water


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Since 1934, the sale of Federal Duck Stamps has generated $670 million, and helped to purchase or lease 5,200,000 acres (8,100 sq mi; 21,000 km2) of habitat. The stamps serve as a license to hunt migratory birds, an entrance pass for all National Wildlife Refuge areas, and are also considered collectors items often purchased for aesthetic reasons outside of the hunting and birding communities. Although non-hunters buy a significant number of Duck Stamps, eighty-seven percent of their sales are contributed by hunters, which is logical, as hunters are required to purchase them. Distribution of funds is managed by the Migratory Bird Conservation Commission (MBCC).
What do the stamps give the purchaser a license to do?
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The answer: hunt migratory birds


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In 2013, Washington University received a record 30,117 applications for a freshman class of 1,500 with an acceptance rate of 13.7%. More than 90% of incoming freshmen whose high schools ranked were ranked in the top 10% of their high school classes. In 2006, the university ranked fourth overall and second among private universities in the number of enrolled National Merit Scholar freshmen, according to the National Merit Scholar Corporation's annual report. In 2008, Washington University was ranked #1 for quality of life according to The Princeton Review, among other top rankings. In addition, the Olin Business School's undergraduate program is among the top 4 in the country. The Olin Business School's undergraduate program is also among the country's most competitive, admitting only 14% of applicants in 2007 and ranking #1 in SAT scores with an average composite of 1492 M+CR according to BusinessWeek.
How many freshman class applications did Washington University receive in 2013?
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The answer:
30,117