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Chromatid Chromosomes Set
Ensemble chromatides chromosomes "démonstration" Features a specialized snap-lock interface that simulates spindle fiber attachment and sister chromatid separation, allowing for tactile demonstration of ploidy transitions and chromosomal disjunction.
High-Contrast Allelic Coding utilizes a color-coded, durable polymer system to represent specific gene loci, enabling the clear visualization of crossing-over events and independent assortment during meiotic prophase I.
₹1,005.00
Quick Answer: The Chromatid Chromosomes Set is a set of model chromosomes for showing how chromosomes are built from chromatids and how they behave when cells divide. Students use the chromatid chromosomes set to model sister chromatids, homologous pairs, mitosis, meiosis and crossing over.
Chromatids, Chromosomes and Pairs
Students often confuse chromosomes and chromatids, and a physical model clears it up quickly. Before a cell divides, each chromosome is copied, and the two identical copies, the sister chromatids, stay joined at the centromere, giving the familiar X shape. When they separate in anaphase, each chromatid becomes a chromosome in its own right. Homologous chromosomes are something else: a matched pair, one inherited from each parent, carrying the same genes but possibly different alleles.
The product photo shows flat chromosome pieces in two colours, a common way of marking maternal and paternal chromosomes, with bands drawn on some pieces and a pair labelled X and Y. With pieces like these, students can lay out a mitosis sequence in which each daughter cell receives one copy of every chromosome, then a meiosis sequence in which homologous pairs separate, and swap coloured segments between chromatids to show crossing over.
The number of pieces, their material and whether they are magnetic are not stated in the listing. For arranging chromosomes into a karyotype, see the karyotype with magnetized chromosomes; for a plant example of the same division, the plant meiosis model.
Lesson Activities
- Laying out the stages of mitosis and checking that the daughter cells are identical
- Modelling meiosis I and II and the halving of chromosome number
- Swapping segments between non-sister chromatids to show crossing over and new allele combinations
- Explaining sex determination with the X and Y chromosomes
Specifications
| Type | Model chromosome pieces for teaching cell division |
| Concepts modelled | Sister chromatids, centromere, homologous pairs, sex chromosomes |
| Processes | Mitosis, meiosis, crossing over |
| Pieces shown in the product photo | Flat chromosome shapes in two colours, some banded, an X and Y pair |
| Number of pieces and material | Confirm at enquiry |
Care & Handling
- Count the pieces back into their container after each lesson, sorted by colour, so no pairs go missing.
- Wipe the pieces with a damp cloth if needed and dry them flat.
- Store them flat and away from heat so they do not warp.
Why Choose LabEquip
Biology teachers preparing students for cell-division questions use a chromatid set because it shows at once whether students can follow where each chromatid goes. It is part of LabEquip’s biology lab products; ask about piece counts through the contact page.
Frequently Asked Questions
What is the difference between a chromosome and a chromatid?
A chromosome is a single DNA molecule with its proteins. After DNA replication it consists of two identical sister chromatids joined at the centromere. Once the chromatids separate during anaphase, each one is counted as a chromosome.
What are homologous chromosomes?
They are a pair of chromosomes, one from each parent, of the same size and shape and carrying the same genes in the same order. The versions of each gene, the alleles, may differ between the two.
How does the set show crossing over?
During prophase of meiosis I, homologous chromosomes pair up and segments are exchanged between non-sister chromatids. With two colours, students can swap matching segments and see chromatids that are part maternal and part paternal.
How do mitosis and meiosis differ in outcome?
Mitosis gives two daughter cells identical to the parent and to each other, with the full chromosome number. Meiosis involves two divisions and gives four cells, each with half the chromosome number and a different mix of alleles because of crossing over and independent assortment.
Why are the chromosomes shown in two colours?
The colours usually represent the maternal and paternal chromosome of each pair. They make it easy to track which parent each chromosome in a gamete came from.
What does independent assortment mean?
In meiosis I, each homologous pair lines up independently of the others, so maternal and paternal chromosomes are shuffled into gametes in many combinations. Students can model it by flipping the orientation of each pair at random.
Last Updated: September 2026
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