Drosophila Salivary Gland Polytene Chromosomes – Giant Genetics Prepared Microscope Slide

Drosophila Salivary Gland Polytene Chromosomes – Giant Genetics Prepared Microscope Slide

Our Drosophila Salivary Gland Polytene Chromosomes slides are expertly prepared using the “squash” technique and specialized staining to highlight the unique banding patterns of polytene chromosomes. This specimen is an essential tool for genetics, cytology, and developmental biology curricula.

Product Specifications:

• Dimensions: 25.4mm x 76.2mm (1″ x 3″)

• Staining: Professionally stained with Aceto-orcein or Feulgen stain. This results in distinct dark purple or magenta bands (chromomeres) that contrast sharply against the lighter interband regions.

• Preparation: Acetic acid squash preparation to spread the chromosomal arms for optimal viewing.

Key Cytogenetic Features:

• Polyteny: These giant chromosomes result from repeated rounds of DNA replication without cell division (endomitosis), creating bundles of thousands of sister chromatids aligned side-by-side.

• Banding Patterns: Observe the highly specific sequence of dark bands and light interbands. These patterns are constant for a given species and act as a physical map of the genome.

• Chromocenter: The central point where the heterochromatic regions of all the chromosomes (including the X, 2, 3, and 4) aggregate.

• Chromosome Arms: Clear visualization of the five long arms and one short arm extending from the chromocenter.

• Puffs (Balbiani Rings): Some preparations may show “puffs”—localized swellings where the DNA has uncoiled for active transcription, representing gene expression in action.

Biological Significance:

• Genome Mapping: Historically used to provide the first physical maps of genes on chromosomes, allowing scientists to correlate genetic mutations with specific chromosomal locations.

• Transcription Study: The presence of puffs allows for the direct microscopic observation of gene activity in response to environmental or developmental cues.

• Evolutionary Biology: Comparison of banding patterns between different Drosophila species helps trace evolutionary inversions and translocations.

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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• Real-time Updates: If your order requires extra preparation time, our team will proactively contact you with a confirmed shipping schedule and tracking details.

 

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

• Custom Quotations: Send us your specific list, and our technical team will provide a detailed quote within 12 hours.

• OEM & Private Label: We offer professional OEM services to create customized slide sets tailored to your curriculum or branding requirements.

• Bulk Inquiries: From rare biological sections to large-scale educational sets, we have the expertise to deliver exactly what you need.

 

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

 

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

• Fast Quotation: Email us your specific list, and receive a formal quote within 12 hours.

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