Definitions

1. Often involved in assisting the expression of other genes (3, 6, 3)
6. Unwinds the DNA strands of a helix (3, 8)
8. Chromosomes are denatured with saturated barium hydroxide, before being stained with Giemsa - this demonstrates constitutive heterochromatin (1, 7)
9. An individual who has two or more genetically different cell lines derived from a single zygote (9)

2. Chromosomes are digested with trypsin, then stained with Giemsa - positive staining bands are black, and negative staining bands are white (1, 7)
3. 'Porcupine men' is an example of what (1, 6, 8)
4. Chromosomes are stained with a fluorescent dye that binds to AT rich regions, such as the DAPI stain or quinacrine, and then viewed under fluorescent microscopes (1, 7)
5. The non-template strand during RNA synthesis (5, 6)
7. A sugar with an attached base (in DNA) is called (1, 10)
8. An individual who is the result of fusion of two zygotes to form a single embryo (7)

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