GENETICS

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Across
  1. 3. Have one chromosome of each pair
  2. 5. Crossing over occurs
  3. 7. A stage in meiosis 2 where the chromosomes become arranged on the metaphase plate
  4. 8. Occurs when DNA gene is damaged or changed
  5. 12. Heritable factor that consist of a length of DNA and influences a specific characteristic
  6. 13. Mutation that exchanges one base for another
  7. 15. Carry the same genes, one from each perental source
Down
  1. 1. Formed by mutations
  2. 2. The failure of one or more pairs of homologus chromosomes or sister chromatids to seperate normally douring nuclear division
  3. 4. Shows the chromosomes of an organism in homologus pairs of decreasing length
  4. 6. The whole of the genetic information of an organism
  5. 9. Various specific form of a gene
  6. 10. specific, fixed position on a chromosome where a particular gene or genetic marker is located
  7. 11. A type of cell division that results in four doughter cells
  8. 14. A genetic disorder caused by the presence of all or part of a third chromosome 21