Exercise 1_Group 4

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Across
  1. 5. The allele that is expressed only in the absence of the dominant.
  2. 7. __________ nervous system controls heart rate, breathing, digestion and blood flow.
  3. 9. A specialised cell that detects a stimulus.
  4. 10. Transports oxygen in the erythrocyte.
Down
  1. 1. Cell division.
  2. 2. The allele that if present is expressed.
  3. 3. The RNA contains ______________ instead of thymine as its base.
  4. 4. ___________ is the sugar in DNA.
  5. 6. One form of a gene such as a red allele and a white allele for pea plants.
  6. 8. _____________________ syndrome individuals have an extra chromosome 21.