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CSET Genetics And Evolution

Subjects : cset, science, genetics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Speciation preceded by a period of geographical isolation






2. The gradual changes in gene frequencies in a population due to random events






3. Similar DNA sequences or protein structures (such as hemoglobin) may link different species to a similar ancestor.






4. The sum total of an organism's requirements; its way of life






5. When chromosome is changed by radiation and chemicals - results a permanent structural change in the chromosome - which will no longer be able to pair with its homologous pair. Eg - deletion - duplication - inversion and translocation.






6. The capacity of an individual of certain genotype to reproduce. It is usually equal to the proportion of the individual's genes in all the genes of the next generation






7. The environmental factors that favour certain phenotypes






8. Process by which a ribosome uses the code on mRNA to make proteins






9. T or F a codon consist of three nucleotides






10. A DNA strand that has the bases CTAATGT forms a complete complementary double helix with






11. Structures in different but related species that are derived from the same ancestral structure but now serve different purposes.






12. Change to a chromosome in which part of the chromosome is repeated






13. A group of organisms of the same species occupying a given area.






14. A change in the base sequence of DNA; the ultimate source of new alleles






15. Separation of species or populations so that they cannot interbreed and produce fertile offspring






16. Movement of organisms ro of from a population






17. Separates DNA by size






18. Evolution of superficial phenotypic similarity of form as a result of similar selection pressures






19. Periods of rapid evolution punctuated by periods of little change






20. When competition causes two closely related species to become more different in regions where their ranges overlap






21. A group of organisms whose members are sufficiently alike to be able to reproduce and produce fertile offspring and who are unable to reproduce with other such groups






22. Another name for a gene






23. Evolution resulting from small specific genetic changes that can lead to a new subspecies






24. Molecules that join together to form DNA and RNA. Monomers that make up a nucleic acid






25. Three dimensional shape of organism made from a mold. May be created with plaster or over time with minerals.






26. Consists of all genes - including all the different alleles - that are present in a population






27. When F1 is fully fertile but F2 has low fertility (rice - cotton)






28. Synonym for protein; chain of amino acids






29. Method of replication that implies that each new strand of DNA is half original and half new






30. Actual remains of an organism such as bones - teeth - shells - etc.






31. Large - scale evolutionary changes that take place over long periods of time






32. A distinct population of a species that varies from other populations of the same species.






33. Movement of alleles into or out of a population due to the migration of individuals to or from the population






34. All the genes in a population. genes are added by reproduction and immigration and lost by death and emigration






35. Condition in which an organism has extra sets of chromosomes






36. Features that are superficially similar but have different modes of development






37. Gradual evolution within a lineage






38. Translation occurs in the...






39. Because of base pairing in DNA the amount of






40. A type of natural selection in which genetic diversity decreases as the population stabilises on a particular trait value






41. You mate the unknown genotype with an organism showing the recessive trait. If any of the offspring show the recessive trait - the original unknown parent was heterozygous. If no recessive trats show up - the original parent was homozygous.






42. Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest






43. An evolutionary 'branch' and its daughter 'twigs'






44. Is a base found in DNA and RNA. Cytosine pairs with Guanine in DNA






45. The evolutionary process by which a species becomes better suited to its niche.






46. It is the time from when the Earth formed and simple life - forms evolved (and it is the longest era)






47. Natural selection that causes the frequency of a particular allele to move in one direction






48. Recognize and cut DNA at specific sequences usually palindromes






49. A trait that masks the expression of another trait






50. Any indirect evidence of life preserved as an impression in rock; trails - footprints - tracks - burrows - and bite marks