Individual organisms come and go, but, to a certain extent, organisms transcend time through producing offspring. Reproduction in animals occurs in two primary ways, through sexual reproduction and through asexual reproduction. While most animal organisms reproduce by sexual means, some are also capable of reproducing asexually. Sexual reproduction introduces new gene combinations in a population through genetic recombination.
28.2A: Advantages and Disadvantages of Sexual Reproduction
Sex: Why bother? Research on pros, cons of sexual reproduction explained -- ScienceDaily
Sexual reproduction has many evolutionary advantages. These include: 1 a genetic variation in offspring that is not seen with asexual reproduction. These advantages not seen in species that reproduce asexually as in asexual reproduction all the offspring are genetically identical to the parent and are therefore equally vulnerable to disease and changes in environment. The disadvantages of sexual reproduction include: 1 Finding a mate uses valuable resources such as time and energy.
What are the advantages and disadvantages of sexual reproduction?
What advantage did sex offer when it first appeared and why does sex persist in modern organisms, stopping them from becoming asexual again? One University of Houston professor thinks he may have uncovered some new clues in answering these questions. By studying one of the great mysteries of biology -- the evolution of sexual reproduction -- Ricardo Azevedo, an assistant professor in the department of biology and biochemistry at UH, has found in a study using a computational model that a leading theory may be more plausible than previously thought, His findings are described in a paper titled "Sexual Reproduction Selects for Robustness and Negative Epistasis in Artificial Gene Networks," appearing in the current issue of Nature, the weekly scientific journal for biological and physical sciences research.
Despite the obvious efficiencies of many forms of asexual reproduction, sexual reproduction abounds. Asexual species, for the most part, are relatively short-lived offshoots of sexual ancestors. From the nineteenth century, it has been recognized that, since there is no obvious advantage to the individuals involved, the advantages of sexual reproduction must be evolutionary. Furthermore, the advantage must be substantial; for example, producing males entails a two-fold cost, compared to dispensing with them and reproducing by parthenogenetic females.