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Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
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Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...
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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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Updated: Jun 3, 2026

Using Mouse Oocytes to Assess Human Gene Function During Meiosis I
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From linkage to genes : positional cloning.

S Bevan1, R S Houlston

  • 1Institute of Cancer Research, Sutton, Surrey, UK.

Methods in Molecular Medicine
|March 5, 2011
PubMed
Summary
This summary is machine-generated.

Linkage analysis helps pinpoint disease gene locations in families. This chapter reviews molecular methods for cloning these genes using linkage data.

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Related Experiment Videos

Last Updated: Jun 3, 2026

Using Mouse Oocytes to Assess Human Gene Function During Meiosis I
11:13

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Published on: April 10, 2018

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09:40

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Published on: September 11, 2017

Area of Science:

  • Genetics
  • Molecular Biology
  • Bioinformatics

Background:

  • Genetic linkage analysis is a powerful tool for mapping disease genes.
  • Identifying disease susceptibility genes is crucial for understanding genetic disorders.

Purpose of the Study:

  • To provide an overview of molecular methods for gene cloning.
  • To explain how linkage data aids in identifying disease susceptibility genes.

Main Methods:

  • Review of established molecular cloning techniques.
  • Explanation of linkage analysis principles and applications.
  • Discussion of bioinformatics tools used in gene mapping.

Main Results:

  • Detailed description of various molecular cloning strategies.
  • Illustrative examples of gene identification through linkage analysis.
  • Overview of computational approaches for analyzing genetic data.

Conclusions:

  • Molecular methods are essential for isolating genes identified by linkage analysis.
  • Successful gene cloning relies on accurate linkage data and appropriate methodologies.
  • This chapter serves as a foundational resource for researchers in human genetics.