Related Experiment Video

Updated: Jun 7, 2026

Simple Method for Fluorescence DNA In Situ Hybridization to Squashed Chromosomes
11:36

Simple Method for Fluorescence DNA In Situ Hybridization to Squashed Chromosomes

Published on: January 6, 2015

Structural chromosome variability in urban and rural populations of Drosophila funebris

N P DUBININ, G G TINIAKOV

    The American Naturalist
    |October 29, 2010
    PubMed
    Abstract

    No abstract available in PubMed .

    Keywords:
    CHROMOSOMES

    More Related Videos

    Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster04:59

    Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster

    Published on: March 28, 2025

    Assessing Differences in Sperm Competitive Ability in Drosophila09:34

    Assessing Differences in Sperm Competitive Ability in Drosophila

    Published on: August 22, 2013

    Related Concept Videos

    Polytene Chromosomes02:04

    Polytene Chromosomes

    Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...
    Position-effect Variegation02:32

    Position-effect Variegation

    In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
    The Ratio of X Chromosome to Autosomes02:45

    The Ratio of X Chromosome to Autosomes

    In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
    Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...