Across
- 3. Alternative forms of a gene.
- 4. The capacity of an individual to survive and produce viable offspring.
- 6. Occurrence of a particular variant of a gene within a population.
- 8. A mechanism that prevents organisms from mating or producing viable offspring.
- 10. The failure of sister chromatids in mitosis or homologues in meiosis to separate and go to opposite poles.
- 14. A change in the gene pool of a population as a result of chance.
- 16. A mutation in which the DNA codon for one amino acid becomes another DNA codon for the same amino acid.
- 17. Speciation that occurs as a result of physical or geographical isolation.
- 18. A mutation that dislocates the translational reading frame.
- 19. Group of similar individuals that can interbreed to produce fertile offspring under natural conditions
- 24. Factors that influence the survival of an individual within a population.
- 25. When a catastrophic event or a period of adverse conditions drastically reduces the size of a population and its genetic diversity.
- 26. The process whereby individuals with certain inheritable traits survive and reproduce more successfully than other individuals, leading to evolutionary change in the population.
- 27. A change in chromosome number in an individual resulting in 3 or more sets of chromosomes.
- 28. A mutation in which nucleotide pairs have been lost from a segment of DNA.
- 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. 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. Relative higher genetic fitness of a phenotype compared with other phenotypes controlled by the same gene.
- 5. Evolution of a new species from an ancestral species.
- 7. The breeding of plants and animals to produce desirable traits in successive generations.
- 9. A change in chromosome number in an individual resulting in an extra or missing chromosome.
- 11. A mutation in which a single nucleotide is swapped for another in the original gene sequence.
- 12. A gene mutation that results in one amino acid being replaced by another amino acid in the encoded protein.
- 13. A mutation in which nucleotide pairs have been added to a segment of DNA.
- 15. Change in the heritable characteristics of biological populations over successive generations, resulting in the development of new species.
- 20. An additional copy of a chromosome present in an individual.
- 21. A mutation that affects a single base-pair position within a gene
- 22. The range of genes and all their alleles present in a population.
- 23. The transfer of alleles that results from emigration and immigration of individuals between populations.