AOS 1.1 Terminology Review Task

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Across
  1. 3. Alternative forms of a gene.
  2. 4. The capacity of an individual to survive and produce viable offspring.
  3. 6. Occurrence of a particular variant of a gene within a population.
  4. 8. A mechanism that prevents organisms from mating or producing viable offspring.
  5. 10. The failure of sister chromatids in mitosis or homologues in meiosis to separate and go to opposite poles.
  6. 14. A change in the gene pool of a population as a result of chance.
  7. 16. A mutation in which the DNA codon for one amino acid becomes another DNA codon for the same amino acid.
  8. 17. Speciation that occurs as a result of physical or geographical isolation.
  9. 18. A mutation that dislocates the translational reading frame.
  10. 19. Group of similar individuals that can interbreed to produce fertile offspring under natural conditions
  11. 24. Factors that influence the survival of an individual within a population.
  12. 25. When a catastrophic event or a period of adverse conditions drastically reduces the size of a population and its genetic diversity.
  13. 26. The process whereby individuals with certain inheritable traits survive and reproduce more successfully than other individuals, leading to evolutionary change in the population.
  14. 27. A change in chromosome number in an individual resulting in 3 or more sets of chromosomes.
  15. 28. A mutation in which nucleotide pairs have been lost from a segment of DNA.
  16. 29. A mutation in which a codon for an amino acid is changed to one that codes for a stop codon, terminating translation.
Down
  1. 1. A type of gene flow that occurs when a few individuals that have become isolated from a larger population do not carry all the alleles that were present in the original population.
  2. 2. Relative higher genetic fitness of a phenotype compared with other phenotypes controlled by the same gene.
  3. 5. Evolution of a new species from an ancestral species.
  4. 7. The breeding of plants and animals to produce desirable traits in successive generations.
  5. 9. A change in chromosome number in an individual resulting in an extra or missing chromosome.
  6. 11. A mutation in which a single nucleotide is swapped for another in the original gene sequence.
  7. 12. A gene mutation that results in one amino acid being replaced by another amino acid in the encoded protein.
  8. 13. A mutation in which nucleotide pairs have been added to a segment of DNA.
  9. 15. Change in the heritable characteristics of biological populations over successive generations, resulting in the development of new species.
  10. 20. An additional copy of a chromosome present in an individual.
  11. 21. A mutation that affects a single base-pair position within a gene
  12. 22. The range of genes and all their alleles present in a population.
  13. 23. The transfer of alleles that results from emigration and immigration of individuals between populations.