Lesson 1 ·Class 10 · Structure of Chromosomes, Cell Cycle and Cell Division · Match Lab
Chromosomes and Chromatin
The same material, in two states.
Match each term to what it means.
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Chromatin and chromosome are not two different things — they are the same material, uncoiled for work and coiled for transport.
What this lesson covers
Challenges to clear
- Match every term.
- Connect chromatin to what it is — the same material as a chromosome, in a different state.
The task
Match each term to what it means.
What this lesson covers
- Chromatin — A fine thread-like network in the non-dividing nucleus (The uncoiled, working state of the same material — this is when the genes are actually being read.)
- Chromosome — Chromatin coiled and condensed so it becomes visible during division (Chroma, colour, and soma, body — they take up stain strongly.)
- DNA — The molecule that carries the genetic information (Chromosomes are made of DNA together with protein.)
- Histone — The protein around which the DNA is wound (It packs an enormous length of DNA into a tiny nucleus.)
- Gene — A segment of DNA occupying a fixed position on a chromosome (The unit of inheritance for one character.)
- Genome — The complete set of genes of an organism (Distinct from a single gene — Selina makes a point of separating the two.)
- Diploid (2n) — Two complete sets of chromosomes, one from each parent (46 in human body cells, as 23 pairs.)
- Haploid (n) — A single set of chromosomes (23 in human sperm and egg — which is why fertilisation restores 46.)
Hint
Chromatin and chromosome are not two different things — they are the same material, uncoiled for work and coiled for transport.