Reproducción | asexual y sexual | Biología
Reproduction: Sexual and Asexual
Overview of Reproduction
- Reproduction is a fundamental characteristic of living beings, enabling the production of new individuals and ensuring species survival to prevent extinction.
- While reproduction is vital for species continuity, it is not essential for individual survival; an individual does not need to reproduce to live, but if no individuals reproduce, the species may face extinction.
Types of Reproduction
Asexual Reproduction
- Asexual reproduction involves generating one or more new individuals from a single parent organism. The offspring are genetically identical clones of the parent.
- Changes can occur in the genome due to mutations during asexual reproduction. This method is common in unicellular organisms like bacteria and also occurs in multicellular organisms such as hydras.
Mechanisms of Asexual Reproduction
- Binary Fission: A single parent duplicates its DNA and divides into two cells, typical in bacteria.
- Budding: A small bud forms on the surface of the parent organism and detaches to become a new individual, seen in yeast and hydras.
- Fragmentation: Organisms break into two or more fragments that develop into new individuals; observed in many plants and animals like starfish and corals.
- Parthenogenesis: An embryo develops from an unfertilized egg cell, occurring in some invertebrates as well as certain fish, amphibians, and reptiles.
Sexual Reproduction