Natural Selection

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Across
  1. 1. A graphic chart used to predict the possible genetic outcomes and probabilities of a cross between two parents.
  2. 3. A specific characteristic or quality of an individual organism.
  3. 4. An allele or trait that is only expressed when two copies are present, and is masked by a dominant allele.
  4. 7. The way in which a trait or characteristic is spread or shared among the individuals of a population.
  5. 9. The result, outcome, or consequence of a specific cause.
  6. 12. A statement or forecast about what will happen in the future based on evidence or past experience.
  7. 14. An allele or trait that is expressed and masks the presence of a recessive allele when at least one copy is present.
  8. 15. A large, complex molecule made of amino acids that performs essential functions and determines traits within an organism.
  9. 17. A diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors from one generation to the next.
  10. 18. A random change in the DNA sequence of a gene that can lead to new traits.
  11. 20. A characteristic that does not provide a survival or reproductive advantage, or may even be disadvantageous in a given environment.
Down
  1. 2. A heritable characteristic that increases an organism's chances of surviving and reproducing in a specific environment.
  2. 5. The surroundings or conditions in which an organism lives, interacts, and survives.
  3. 6. A segment of DNA that contains the instructions for making a specific protein and determines a trait.
  4. 8. A group of individuals of the same species living in the same area at the same time.
  5. 10. A group of individuals born and living at about the same time, or the step in the line of descent from an ancestor.
  6. 11. A type of bar graph used to display the frequency and distribution of numerical data.
  7. 13. The process by which individuals with favorable traits are more likely to survive and reproduce, passing those traits on to the next generation.
  8. 16. The differences in traits among individuals within a population.
  9. 19. An event, action, or agent that produces an effect or brings about a change.