Pam Mack April 6/17

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Across
  1. 3. all genes and their alleles in the population
  2. 6. controlled by two or more traits
  3. 7. time it takes for half the radio active material to decay
  4. 8. had a theory of biogenesis
  5. 10. this is the original genetic coding system
  6. 12. middle of the curve has a higher fitness
  7. 13. something bad happens and only one trait gets to stay and get passed on
  8. 14. a trait controlled by only one gene
  9. 15. occurs during gamete production
Down
  1. 1. how many individuals of the same species that can be interbred
  2. 2. live in extreme conditions on earth
  3. 4. what gas did not appear on earth until 1.8 billion years ago?
  4. 5. one end has a higher fitness
  5. 9. formation of new species
  6. 11. both ends are better than the middle