Genetics and Natural Selection

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Across
  1. 2. A trait that you almost always see, like right handed.
  2. 4. One important limiting factor is_____.
  3. 5. A group of the same species in the same area.
  4. 6. This nitrogen base always pairs with cytocine.
  5. 13. A punnett square is used to ____ the traits that an offspring might have.
  6. 14. A trait that you hardly ever see, like left handed.
  7. 18. The job, seeing at night, running fast, walking.
  8. 19. When a variation has been passed on for several generations and now all of the population has this variation we call it an ____.
  9. 20. How an organisms looks, tall or left handed
  10. 22. The _____ factors in an environment are what keeps an organisms from surviving and passing on traits.
  11. 23. _____ selection is when a change occurs to an organisms genes that gets passed on to offspring.
  12. 24. Amino ____ are sets of instruction that are created by 3 nitrogen bases that code for specific proteins. ATC or TGA
  13. 26. The ___ bases are the rungs of the DNA molecule and aways pair in a specific way.
  14. 29. The different parts of a chromosomes they code for proteins.
  15. 31. The genes that an organisms has, TT or Tt or
  16. 33. This nitrogen base always pairs with thymine.
  17. 34. Living things
  18. 35. A change in an organisms DNA.
  19. 36. This is an organisms with a mix of dominant and recessive traits Bb.
  20. 37. when an organism is a mix of genes from parents, like humans.
  21. 38. This is an organism with 2 of the same trait, BB or bb.
  22. 39. During the process of cell replication DNA condenses into these, humans have 46.
Down
  1. 1. What we call children.
  2. 3. One single living thing.
  3. 7. The 2 choices that are available for each gene, for example left or right handed.
  4. 8. non-living things.
  5. 9. When a change in the order of the nitrogen _____ occurs this can cause a mutation.
  6. 10. Artificial ______ is when humans choose specific traits for an organism, for example the shape of the nose or how many tomatoes a plant produces.
  7. 11. how a trait looks, shape or size, or the ability to see at night.
  8. 12. What all organisms are made of, what genes code for.
  9. 15. The different ways a trait can look, for example the different shapes of the squash.
  10. 16. _____ structure is something that we have but don't use any more like appendix.
  11. 17. When an organisms has all of the same alleles for every gene and looks exactly like their parents.
  12. 21. A characteristics like hair color or height.
  13. 25. When a variation helps an organisms survive it _____ the chance that that variation will be passed on.
  14. 27. The number of chromosome pairs that humans have.
  15. 28. ______ structures may look the same but the organisms have different ancestry. For example a butterfly and a bird.
  16. 30. The blueprint for all organisms, the instructions.
  17. 32. ______ structures are things like arms in organisms that have the same ancestry.