B1- You and your genes 0.0 / 5 ? BiologyGenesGCSEOCR Created by: toomanykids666Created on: 21-04-14 08:41 Nucleus The control centre of the cell. Contains genetic material. 1 of 5 Chromosomes The genetic material in the nucleus. Each chromosome is one long piece of DNA coiled up. 2 of 5 Gene A short length of a chromosome. They control the development of characteristics and how an organism functions. 3 of 5 Allele Different versions of the same gene e.g. eye colours. 4 of 5 Genotype The genes an organism has e.g. Bb for brown eyes 5 of 5
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