Describe the role of secondary sexual characteristics in the reproduction of organisms.

Secondary sexual characteristics develop under the influence of sex hormones, indicating the sexual maturity of an individual. They are manifested in differences in body size and proportions, plumage coloring, in particular hairline, sound signals (in birds), the presence of a carrying bag, mammary glands, etc. In some species, these signs are constant, in others they can only appear during the mating season .
The main role of secondary sexual characteristics is to provide attractiveness in the eyes of the opposite sex. Of course, many secondary signs do not play any role in reproduction and are only a consequence of age-related changes in the body, for example, Adam’s apple in men, coarsening of the voice, especially the hairline. But if you look deeper, they all contribute to giving a person masculinity or femininity, which in turn also provides attractiveness. In the animal kingdom, secondary sexual characteristics play an even greater role, it is enough to recall the pride of a rooster – scallop, moose – horns, the color of many males and females. All this is necessary to attract the opposite sex and create a more “worthy” pair for procreation.