Guppy males exhibit many elaborate secondary sexual characters, Heartrate Electrode and in the wild, populations exhibit extreme polymorphic characters.Several of these characters have been shown to be attractive to females: conspicuous coloration, especially bright orange and black spots, large caudal fins and body size, high courtship display rate and so on.Knowing the Y-linkage of many quantitative traits, the work of selection of domesticated strains of guppy is easier.
Excepting the body-base colour and other one-locus sex-linked but recombining colour patterns, Unisex Perfume the characters of interest in guppy culture can be selected on father and sons only.