Equation 2 · Part 1 · From Origins to Frontier: A History of Evolutionary Biology and Ecology
Symbol Δ p
What this part means
Δ p is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.
Its job in the formula
Δ p is an argument of the function-like quantity on the left; its role is set by that function’s stated inputs.
Full expression→Symbol Δ p→Article meaning
The passage around this formula
Sewall Wright’s 1931 paper, “Evolution in Mendelian Populations,” added the piece Fisher’s and Haldane’s more deterministic treatments lacked: a formal account of genetic drift, the random change in allele frequency from generation to generation caused by finite population size [ 3 ] . Wright showed that in a randomly mating population of effective size , the variance in allele frequency change per generation from sampling alone is . for a diploid population starting at allele frequency p . This single expression carries a real consequence: small populations can fix or lose alleles by chance alone, independent of whether those alleles are beneficial, neutral, or mildly…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
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Sources cited in the surrounding passage
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