Biology Revision

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Across
  1. 4. a medical device used to treat atherosclerosis
  2. 5. Allele expressed in a heterozygote
  3. 9. Asexual cell division where two identical cells are formed
  4. 10. Different form of a gene
  5. 11. where ovulation occurs
Down
  1. 1. an artery that has a valve and carries oxygenated blood
  2. 2. the seed coat
  3. 3. A letter description of the pair of alleles present for a characteristic, e.g., BB, Bb or bb.
  4. 4. the male part of the flower where meiosis occurs
  5. 6. a DNA mutation that results in the addition of an extra nucleobase
  6. 7. the hormone that stimulates the release of oestrogen
  7. 8. The two-stage process of cell division which reduces the chromosome number of the daughter cells.