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Related Concept Videos

Crossing Over01:34

Crossing Over

147.3K
Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...
147.3K
Nondisjunction01:29

Nondisjunction

75.9K
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
75.9K
Asexual Reproduction02:38

Asexual Reproduction

31.8K
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.
31.8K
Meiosis I01:49

Meiosis I

193.9K
Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
193.9K
Gene Conversion02:08

Gene Conversion

9.8K
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...
9.8K
Incomplete Dominance01:43

Incomplete Dominance

23.0K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
23.0K

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Related Experiment Video

Updated: Aug 1, 2025

Laser-assisted Microdissection LAM as a Tool for Transcriptional Profiling of Individual Cell Types
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Laser-assisted Microdissection LAM as a Tool for Transcriptional Profiling of Individual Cell Types

Published on: May 10, 2016

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Apomixis.

Yazhong Wang1, Charles J Underwood1

  • 1Department of Chromosome Biology, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829 Cologne, Germany.

Current Biology : CB
|April 25, 2023
PubMed
Summary

Apomixis in plants is introduced, enabling asexual reproduction through seeds. This process bypasses sexual reproduction, offering potential benefits for agriculture and plant breeding.

Area of Science:

  • Plant reproductive biology
  • Genetics
  • Agricultural science

Background:

  • Apomixis, asexual reproduction in plants via seeds, is a complex trait.
  • Understanding apomixis is crucial for its application in crop improvement.

Purpose of the Study:

  • To introduce and explain the concept of apomixis in plants.
  • To highlight the significance of apomixis for plant breeding and agriculture.

Main Methods:

  • Review of existing literature on plant reproduction.
  • Explanation of the biological mechanisms underlying apomixis.

Main Results:

  • Apomixis allows plants to produce seeds without fertilization.
  • This results in offspring genetically identical to the mother plant.

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Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds
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Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

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Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting
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Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting

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Related Experiment Videos

Last Updated: Aug 1, 2025

Laser-assisted Microdissection LAM as a Tool for Transcriptional Profiling of Individual Cell Types
09:31

Laser-assisted Microdissection LAM as a Tool for Transcriptional Profiling of Individual Cell Types

Published on: May 10, 2016

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Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds
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Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds

Published on: June 7, 2013

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Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting
07:17

Generation of Chimeric Axolotls with Mutant Haploid Limbs Through Embryonic Grafting

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Conclusions:

  • Apomixis offers a powerful tool for plant breeders to fix desirable traits.
  • Harnessing apomixis can accelerate crop development and improve agricultural sustainability.