▪ Abstract Over 35 years ago, Susumu Ohno stated that gene duplication was the single
most important factor in evolution. He reiterated this point a few years later in proposing that …

Teleost fish, which roughly make up half of the extant vertebrate species, exhibit an amazing
level of biodiversity affecting their morphology, ecology and behaviour as well as many other …

Sex-specific morphs exhibit discrete phenotypes, often including many disparate traits, that
are observed in only one sex. These morphs have evolved independently in many different …

Adaptation is commonly a multidimensional problem, with changes in multiple traits required
to match a complex environment. This is epitomized by balanced polymorphisms in which …

Sex chromosomes differ from other chromosomes in the striking divergence they often show
in size, structure, and gene content. Not only do they possess genes controlling sex …

Sexually antagonistic polymorphisms are polymorphisms in which the allele that is
advantageous in one sex is deleterious in the other sex. In an influential 1984 paper, W …

Once recombination is halted between the X and Y chromosomes, sex chromosomes begin
to differentiate and transition to heteromorphism. While there is a remarkable variation …

The sex chromosome pairs of many species do not undergo genetic recombination, unlike
the autosomes. It has been proposed that the suppressed recombination results from natural …

Loss of recombination between sex chromosomes often depletes Y chromosomes of
functional content and genetic variation, which might limit their potential to generate …

We report construction of a genetic linkage map of the guppy genome using 790 single
nucleotide polymorphism markers, integrated from six map** crosses. The markers define …