On the Makaloa Mat LondonJack Publishedaambhq

john9221 · Wysłany: Sob 19:42, 05 Mar 2011

have to assume that the short tail was
in itself genetically inheritedonly that it served as an indicator of
some genetic inferiority. Anywayfor whatever reasonlet us suppose
that f [link widoczny dla zalogowanych][link widoczny dla zalogowanych]les in the ancestral bird of paradise species preferentially
went for males with longer than average tails. Provided there was
some genetic contribution to the natural variation in male tail-length
this would in time cause the average tail-length of males in the
population to increase. F[link widoczny dla zalogowanych]les followed a simple rule: look all the
males overand go for the one with the longest tail. Any f[link widoczny dla zalogowanych]le who
departed from this rule was penalized
even if tails had already
Battle of the sexes 159
become so long that they actually encumbered males possessing
them. This was because any f[link widoczny dla zalogowanych]le who did not produce long-tailed
sons had little chance of one of her sons being regarded as attractive.
Like a fashion in women's clothesor in American car designthe
trend toward longer tails took off and gathered its own momentum. It
was stopped only when tails became so grotesquely long that their
manifest disadvantages started to outweigh the advantage of sexual
attractiveness.
This is a hard idea to swallowand it has attracted its sceptics ever
since Darwin first proposeyilai:
[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]