Chironomus Salivary Gland Polytene Chromosomes, Giant Chromosome Prepared Microscope Slides

Our Chironomus salivary gland prepared slides offer a spectacular view of polytene chromosomes, providing a foundational resource for studying genetics and cell biology. Meticulously stained with aceto-orcein or similar nuclear stains, these slides reveal the intricate banding patterns and structural puffs that represent active gene transcription in giant cells.

Key Morphological Features:

Giant Size: These chromosomes are thousands of times larger than standard mitotic chromosomes, making them easily visible under medium to high magnification.
Banding Patterns: Observe the distinct dark bands (chromomeres) and light interbands, which serve as a physical map of the insect’s genome.
Chromosome Puffs: Clearly identify “puffs” (Balbiani rings), which are sites of intense RNA synthesis and active gene expression.
Chromocenter: The slide demonstrates how the centromeric regions of all chromosomes often aggregate to form a single, dark-staining mass.

Biological Significance:

- Model Organism: Chironomus (non-biting midges) are widely used in laboratories because their salivary gland cells undergo repeated rounds of DNA replication without cell division (endomitosis), leading to the formation of polytene chromosomes.
- Genetics Education: An essential specimen for demonstrating the relationship between chromosomal structure and gene activity.
- Research Value: These slides are used to study chromosome mapping, gene puffs in response to environmental stimuli, and evolutionary cytology.

For a deep dive into the discovery of polytene chromosomes and their role in early cytogenetic research, visit the Wikipedia entry: Polytene chromosome – Wikipedia

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Can’t find a specific specimen? As a leading manufacturer of prepared microscope slides, we specialize in bespoke solutions:

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Key Terminology for Microscope Slides

To help you select the most suitable specimen for your research or teaching, please refer to our standard sectioning abbreviations:

W.M. (Whole Mount): The entire organism or structure is preserved and mounted on the slide.
C.S. (Cross Section): A thin transverse section through the organism or tissue plane.
L.S. (Longitudinal Section): A vertical section along the longest plane of the organism.
C.S. & L.S.: Both Cross and Longitudinal sections are mounted on the same slide for side-by-side comparison.

Extensive Catalog: Over 3,000+ Prepared Slides

As a leading Microscope Prepared Slides Manufacturer from China, we provide a comprehensive range of biological specimens across multiple disciplines:

Product Category	Variety Count	Product Category	Variety Count
🌿 Botany	868 Kinds	🧬 Cell Biology & Genetics	64 Kinds
🔬 Histology	375 Kinds	🧪 Botany Pathology	373 Kinds
🦁 Zoology	459 Kinds	➗ Mitosis & Meiosis	66 Kinds
🐾 Animal Pathology	150 Kinds	🐣 Embryology	75 Kinds
🧫 Microbiology	100 Kinds	🦟 Parasitology	120 Kinds
🪨 Petrology (Rock Sections)	291 Kinds	🛠️ Customized Sets	Available

Looking for Custom Microscope Slides?

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If your required items are not listed in our standard catalog, we’ve got you covered!

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