Chapter 9 - Genetics

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Across
  1. 3. Mendel's law that states that the pairs of homologous chromosomes separate in meiosis so that only one chromosome from each pair is present in each gamete
  2. 4. a condition in which a trait in an individual is intermediate between the phenotype of the individual's two parents because the dominant allele is unable to express itself fully
  3. 7. the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
  4. 8. a cross between individuals that have different alleles for the same gene
  5. 9. an organism's appearance or other detectable characteristic that results from the organism's genotype and the environment
  6. 13. the first generation of offspring obtained from an experimental cross of two organisms
  7. 16. the second generation of offspring, obtained from an experimental cross of two organisms; the offspring of the F1 generation
  8. 17. genetically determined characteristic
  9. 19. the likelihood that a possible future event will occur in any given instance of the event
  10. 20. describes an individual that has two different alleles for a trait
  11. 21. in genetics, describes an allele that is expressed only when no dominant allele is present in an individual
  12. 22. parental generation, the first two individuals that mate in a genetic cross
Down
  1. 1. in genetics, describes an allele that is fully expressed whenever the allele is present in an individual
  2. 2. a relationship in which one allele is completely dominant over another
  3. 5. study of the passing of traits from parents to offspring
  4. 6. the ratio of the genotypes that appear in offspring
  5. 10. a cross between individuals that involves one pair of contrasting traits
  6. 11. describes an individual that has identical alleles for a trait on both homologous chromosomes
  7. 12. the entire genetic makeup of an organism; also the combination of genes for one or more specific traits
  8. 14. a graphic used to predict the results of a genetic cross
  9. 15. a condition in which both alleles for a gene are fully expressed
  10. 18. one of the alternative forms of a gene that governs a characteristic, such as hair color