reproductive isolation

Examples of reproductive isolation in the following topics:

• Reproductive Isolation

  • Reproductive isolation, through mechanical, behavioral, and physiological barriers, is an important component of speciation.
  • Scientists classify reproductive isolation in two groups: prezygotic barriers and postzygotic barriers.
  • Differences in breeding schedules, called temporal isolation, can act as a form of reproductive isolation.
  • These two related frog species exhibit temporal reproductive isolation.
  • Reproductive organ incompatibility keeps the species reproductively isolated.

• Hybrid Zones

  • Over time, two species may further diverge or reconnect, depending on the fitness strength and the reproductive barriers of the hybrids.
  • Over time, the hybrid zone may change depending on the fitness strength and the reproductive barriers of the hybrids .
  • If the hybrids are as fit or more fit than the parents, or the reproductive barriers weaken, the two species may fuse back into one species (reconnection).
  • Reproductive isolation between hybrids and their parents was once thought to be particularly difficult to achieve; thus, hybrid species were thought to be extremely rare.
  • Reinforcement, fusion, or stability may result, depending on reproductive barriers and the relative fitness of the hybrids.

• Sympatric Speciation

  • Scientists have identified two main types of polyploidy that can lead to reproductive isolation, or the inability to interbreed with normal individuals, of an individual in the polyploidy state.
  • Notice how it takes two generations, or two reproductive acts, before the viable fertile hybrid results.

• Types of Sexual and Asexual Reproduction

  • Asexual and sexual reproduction, two methods of reproduction among animals, produce offspring that are clones or genetically unique.
  • The queen bee controls the reproduction of the hive bees to regulate the type of bee produced.
  • Two Komodo dragons, a bonnethead shark, and a blacktip shark have produced parthenogenic young when the females have been isolated from males.
  • Sexual reproduction produces offspring with novel combinations of genes.
  • Hermaphroditism occurs in animals where one individual has both male and female reproductive parts.

• External and Internal Fertilization

  • External and internal fertilization are forms of reproduction that vary in method and embryo development.
  • The release of the reproductive material may be triggered by water temperature or the length of daylight.
  • The embryo is isolated within the female, which limits predation on the young.

• Methods of Reproducing

  • Most importantly, reproduction is necessary for the survival of a species.
  • The known methods of reproduction are broadly grouped into two main types: sexual and asexual.
  • Organisms that reproduce through asexual reproduction tend to grow in number exponentially.
  • Sexual reproduction ensures a mixing of the gene pool of the species.
  • Female seahorses produce eggs for reproduction that are then fertilized by the male.

• Plant Reproductive Development and Structure

  • Plants have evolved different reproductive strategies for the continuation of their species.
  • Plant sexual reproduction usually depends on pollinating agents, while asexual reproduction is independent of these agents.
  • Vegetative reproduction is a type of asexual reproduction.
  • The flower is the reproductive organ of plants classified as angiosperms.
  • The basic function of a flower is to produce seeds through sexual reproduction.

• Glomeromycota

  • This gene is highly conserved and commonly used in phylogenetic studies so it was isolated from spores of each taxonomic group.

• Asexual Reproduction in Plants

  • Many plants are able to propagate themselves using asexual reproduction.
  • Plants have two main types of asexual reproduction: vegetative reproduction and apomixis.
  • Many different types of roots exhibit vegetative reproduction .
  • This method of reproduction is known as apomixis.
  • Different types of stems allow for asexual reproduction.

• Reproductive Cloning

  • Reproductive cloning, possible through artificially-induced asexual reproduction, is a method used to make a clone of an entire organism.
  • Reproductive cloning is a method used to make a clone or an identical copy of an entire multicellular organism.
  • This idea forms the basis for reproductive cloning.
  • It can be used for either therapeutic cloning or reproductive cloning.
  • The success rate of reproductive cloning at the time was very low.