For one, stories like mine will become rarer and rarer.
This was a particular advantage for rarer forms of cancer where predications using more conventional methods are very challenging.
Fisher's (1930) insight was that the rarer sex obtains a mating advantage, and so mothers should over-produce this sex, all other things being equal.
He showed that if one sex was more beneficial to produce (or, to put it another way, less costly in net fitness terms), females should over-produce that sex, up to the point that there was a balancing mating advantage to being the rarer sex.
Mating success of small, younger-maturing males ("jacks") is frequency-dependent relative to large, older-maturing males [ 15, 27], and jacks enjoy reproductive advantages when their form is rarer [ 15, 24, 27, 29- 31].
It is hypothesised that there is a cost to dispersing to a new site, the chance of not finding a mate of the same species, that selects against it for rarer species, whereas there is probably an advantage to dispersal for species that have colony sites that change dramatically during periods of glacial advance or retreat.
As natural selection favors parasites that match the most common host genotype, overrepresented host genotypes become disproportionately unfit, while rarer allele combinations now have a fitness advantage.
Instead of choosing songs that could rock the big room, Yo La Tengo took advantage of the theater for something rarer: concert-hall silence that let introspective songs be heard in every detail.
No matter what you do in life, you will have a huge advantage if you can read a paragraph and discern its meaning (a rarer talent than you might suppose).
Four additional rarer forms have been described.
