chromosomes, genes and Dna

isobellehardy
Mind Map by isobellehardy, updated more than 1 year ago
isobellehardy
Created by isobellehardy over 6 years ago
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Mind Map on chromosomes, genes and Dna, created by isobellehardy on 10/05/2015.

Resource summary

chromosomes, genes and Dna
  1. THE NUCLEUS OF THE CELL CONTAINS THE CHROMOSOMES.
    1. THE GENES ARE LOCATED ON THE CHROMOSOMES
    2. a GENE IS A SECTION OF A DNA MOLECULE THAT CONTROLS THE DEVELOPMENT OF CERTAIN CHARACTERISTICS
      1. Genes exist in alternative forms called alleles, which give rise to differences in the inherited characteristics
        1. In human cells the diploid number of cells is 46 and the haploid number is 23
          1. The sex of the person is controlled by one pair of sex hromosomes, XX in females and Xy in males
            1. Mutation is a rare random change in the genetic material that can be inheried
              1. many mutations are harmful, but many are also neutral and a few are beneficial
                1. the incidence of mutations can be increased by exposure to ionising radiation or chemical mutagens
                  1. chromosomes and genes
                    1. contained in the nucleus of the cell
                      1. made up of Dna
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