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Related Concept Videos

Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
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Related Experiment Video

Updated: May 24, 2026

Use of Bisection to Reduce Mitochondrial DNA in the Bovine Oocyte
06:15

Use of Bisection to Reduce Mitochondrial DNA in the Bovine Oocyte

Published on: July 6, 2022

Eliminating mitochondrial DNA from sperm.

David C Chan1, Eric A Schon

  • 1Division of Biology, California Institute of Technology, and the Howard Hughes Medical Institute, Pasadena, CA 91125, USA. dchan@caltech.edu

Developmental Cell
|March 17, 2012
PubMed
Summary
This summary is machine-generated.

Most eukaryotes inherit mitochondrial DNA (mtDNA) from one parent. Drosophila sperm development actively eliminates mtDNA, ensuring mature sperm are DNA-free, a novel finding in reproductive biology.

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Last Updated: May 24, 2026

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An In Vitro Approach to Study Mitochondrial Dysfunction: A Cybrid Model

Published on: March 9, 2022

Area of Science:

  • Reproductive Biology
  • Genetics
  • Cell Biology

Background:

  • Mitochondrial DNA (mtDNA) is typically inherited uniparentally in eukaryotes.
  • Understanding the mechanisms governing mtDNA inheritance is crucial for developmental biology.

Discussion:

  • This study investigates the fate of mtDNA during male gametogenesis in Drosophila.
  • Active elimination of mtDNA from developing sperm is demonstrated as a key regulatory process.

Key Insights:

  • DeLuca and O'Farrell (2012) reveal that Drosophila actively removes mtDNA during sperm development.
  • This process ensures that mature spermatozoa are completely devoid of mitochondrial DNA.

Outlook:

  • Further research could explore the conserved nature of this mtDNA elimination mechanism across different species.
  • Investigating the molecular players involved in mtDNA degradation during spermatogenesis is warranted.