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Related Concept Videos

Asexual Reproduction02:38

Asexual Reproduction

Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Genetics of Speciation02:16

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

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Related Experiment Video

Updated: Jun 17, 2026

Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates
13:55

Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates

Published on: January 27, 2019

From clonal to sexual: a step in T. congolense evolution?

Philippe Holzmuller1, Stéphane Herder, Gérard Cuny

  • 1CIRAD UMR 17 Trypanosomes, TA A-17/G, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France. philippe.holzmuller@cirad.fr

Trends in Parasitology
|December 17, 2009
PubMed
Summary

Genetic exchange, or mating, is now confirmed in Trypanosoma congolense using population genetics. This study explores how mating is triggered in the trypanosome life cycle, using statistical methods to provide evidence.

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Area of Science:

  • Parasitology
  • Genetics
  • Population Biology

Background:

  • Genetic exchange was previously confirmed in Trypanosoma brucei.
  • The existence of mating in Trypanosoma congolense was recently established by Morrison and colleagues.
  • Evidence for mating in other trypanosome species remains controversial.

Purpose of the Study:

  • To investigate the mechanisms that induce mating during the trypanosome life cycle.
  • To discuss the application of statistical methods in demonstrating non-obligatory biological processes like mating.
  • To build upon the recent discovery of mating in Trypanosoma congolense.

Main Methods:

  • Population genetics analysis was previously used to establish mating in Trypanosoma congolense.
  • Statistical approaches are discussed for evidencing non-obligatory biological processes.
  • The study focuses on the induction of mating within the trypanosome life cycle.

Main Results:

  • Mating has been established in Trypanosoma congolense.
  • Statistical methods can provide evidence for non-obligatory biological processes.
  • The induction of mating is a key area for further research.

Conclusions:

  • Mating is a confirmed biological process in Trypanosoma congolense.
  • Statistical analysis is a valuable tool for studying complex life cycle events.
  • Understanding mating induction is crucial for trypanosome research.