Chapter 4 Genetics

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Across
  1. 3. the genetic constitution of an individual organism.
  2. 6. an organism that always produces descendants with the same trait for a specific character
  3. 7. drift variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
  4. 9. inheritance occurs when one characteristic is controlled by two or more genes.
  5. 10. dominance a dominant allele, or form of a gene, does not completely mask the effects of a recessive allele
  6. 12. trait a trait of specific character that appears in a hybrid organism
  7. 14. any observable feature, or trait, of an organism, whether acquired or inherited.
  8. 15. dominance a pattern of inheritance in which there are only all
Down
  1. 1. the passing on of physical or mental characteristics genetically from one generation to another.
  2. 2. a relationship between two versions of a gene.
  3. 4. a change or the process of change by which an organism or species becomes better suited to its environment.
  4. 5. trait a trait of a specific character that is hidden by the dominant as a hybrid organism
  5. 6. the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
  6. 8. an organism with a mix of alleles for a specific character
  7. 11. a specific characteristic of an organism.
  8. 13. selection the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.