相关实验视频

Updated: Jul 12, 2026

A Bioinformatics Pipeline for Investigating Molecular Evolution and Gene Expression using RNA-seq
07:09

A Bioinformatics Pipeline for Investigating Molecular Evolution and Gene Expression using RNA-seq

Published on: May 28, 2021

在三个奥斯蒙达物种中,DNA杂交和进化关系

D B Stein, W F Thompson

    Science (New York, N.Y.)
    |September 12, 1975
    PubMed
    概括

    DNA杂交显示,奥斯蒙达claytoniana与奥斯蒙达cinnamomea的遗传物质比奥斯蒙达regalis更多. 这一发现支持传统的类别对最近的数值分析.

    更多相关视频

    Hybridization in situ of Salivary Glands, Ovaries, and Embryos of Vector Mosquitoes10:58

    Hybridization in situ of Salivary Glands, Ovaries, and Embryos of Vector Mosquitoes

    Published on: June 28, 2012

    A Converging Strategy for the Generation of a Virtually Sequenced cDNA Library from Unreferenced Pacific Oysters12:14

    A Converging Strategy for the Generation of a Virtually Sequenced cDNA Library from Unreferenced Pacific Oysters

    Published on: June 13, 2019

    相关概念视频

    Evolutionary Relationships through Genome Comparisons02:54

    Evolutionary Relationships through Genome Comparisons

    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...
    Hybrid Zones02:29

    Hybrid Zones

    Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.Gene flow and natural selection are evolutionary mechanisms that shape the outcome of a hybrid zone. Gene flow...
    Gene Duplication and Divergence02:37

    Gene Duplication and Divergence

    The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
    The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
    Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes02:16

    Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes

    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...
    Synteny and Evolution02:31

    Synteny and Evolution

    John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
    Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
    Modern Molecular Taxonomy01:29

    Modern Molecular Taxonomy

    Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...