2694581
Beschreibung
Mindmap von isobellehardy, aktualisiert more than 1 year ago
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Erstellt von isobellehardy
vor fast 9 Jahre
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chromosomes, genes and Dna
- THE NUCLEUS OF THE CELL CONTAINS THE CHROMOSOMES.
- THE GENES ARE LOCATED ON THE CHROMOSOMES
- THE GENES ARE LOCATED ON THE CHROMOSOMES
- a GENE IS A SECTION OF A DNA MOLECULE THAT CONTROLS THE DEVELOPMENT OF CERTAIN CHARACTERISTICS
- Genes exist in alternative forms called alleles, which give rise to differences in the inherited characteristics
- In human cells the diploid number of cells is 46 and the haploid number is 23
- The sex of the person is controlled by one pair of sex hromosomes, XX in females and Xy in males
- Mutation is a rare random change in the genetic material that can be inheried
- many mutations are harmful, but many are also neutral and a few are beneficial
- the incidence of mutations can be increased by exposure to ionising radiation or chemical mutagens
- chromosomes and genes
- contained in the nucleus of the cell
- made up of Dna
- contained in the nucleus of the cell
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