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Related Concept Videos

Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
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Genomic DNA in Eukaryotes00:58

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Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
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Genomic DNA in Prokaryotes00:46

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The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
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Evolutionary Relationships through Genome Comparisons02:54

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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes02:16

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The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
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Osmoregulation in Fishes02:32

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When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
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Related Experiment Video

Updated: Jan 16, 2026

A Converging Strategy for the Generation of a Virtually Sequenced cDNA Library from Unreferenced Pacific Oysters
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Ocean Genomes: reference genome resources for marine vertebrates.

Lara Parata1, Emma de Jong1, Richard J Edwards1

  • 1Minderoo OceanOmics Centre at UWA, Oceans Institute, University of Western Australia, Perth, WA, Australia.

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Ocean Genomes is a new program creating reference genomes for marine vertebrate biodiversity. This resource will aid in better monitoring and management of these vital species.

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Area of Science:

  • Marine Biology
  • Genomics
  • Biodiversity Conservation

Background:

  • Effective monitoring and management of marine vertebrate biodiversity require robust genomic resources.
  • Current genomic data for marine vertebrates is insufficient for comprehensive conservation efforts.

Purpose of the Study:

  • To establish Ocean Genomes, a program for generating high-quality reference genomes for marine vertebrates.
  • To support improved monitoring and management strategies for marine biodiversity.

Main Methods:

  • Generating high-quality reference genomes for representatives of all marine vertebrate families.
  • Producing draft-quality genomes for a broader species sampling.
  • Utilizing case studies, including Enoplosus armatus, Old Wife, and Pempheris klunzingeri.

Main Results:

  • Initiation of a comprehensive marine vertebrate genome resource.
  • Development of foundational genomic data for key marine species.
  • Demonstration of genome generation feasibility through case studies.

Conclusions:

  • The Ocean Genomes program will provide essential genomic tools for marine conservation.
  • High-quality reference genomes are crucial for advancing marine biodiversity research and management.
  • This initiative represents a significant step towards understanding and protecting marine vertebrate populations.