: 11 The later definition by Cavalli-Sforza & Bodmer (1971) is currently used: Genetic polymorphism is the occurrence in the same population of two or more alleles at one locus, each with appreciable frequency, where the minimum frequency is typically taken as 1%.
The financial world splits up its calendar into four quarters, each three months long. If January to March is the first quarter, April to June is the second quarter, and so on, though a company's first quarter does not have to begin in January.
The calendar year can be divided into 4 quarters, often abbreviated Q1, Q2, Q3 and Q4. These are typically of slightly differing lengths and aligned to month boundaries for convenience: 2015-2016. 1  First quarter / Q1: from the beginning of October to the end of December (01/10 - 31/12) 2015. 2  Second quarter / Q2: from the beginning of January to the end of March (01/01 - 31/03) 2016.